Crushers of tomatoes, cereals, olives. Potato peelers, mincers, sausages, etc.
- News
-
hoppers-sausages-cutters
- Garhe manual mincers
- Garhe domestic mincers
- Meat grinder and electric sausage machine
- Sammic professional mincers
- Garhe and Sammic mincer accessories
- Talsa industrial meat grinder
- Accessories for Talsa meat grinders ›
- Sammic mincers-cutters-emulsifiers
- Industrial meat cutter. Talsa
- Sausage machine ›
- Infrico maturing drying cabinets
- Pig slaughtering accessories
- Garhe chopper spare parts
- Sammic spare parts and accessories
-
Food preparation
- Spiral Dough Mixers ›
- Meat mixers
- Infrico meat ripening cabinets
- Chicken, sheep and pig roaster ›
- Plunging Mixers ›
- Slicers and Bone saw
- Hamburger formers
- Water - oil fryers
- Electric fryer
- Convection ovens
- Pizza machines
- Talsa Professional cookers ›
- Cooking tools
- Peeler and cut vegetables ›
- Snack plates ›
- Tomato grinder and grouting device ›
- Cafeteria - Buffet
- Accessories
-
Spare parts
-
Sammic Spare parts
›
- Sammic blast chillers spare parts
- Sammic can opener spare parts ›
-
Sammic hook mixers spare parts
›
- Sammic SM-10 mixer spare parts
- SM 20 Sammic mixer spare parts
- Spare parts mixers SM 33/40/50 Sammic
- Spare parts mixers SM 75 Sammic
- SME 20 Sammic mixer spare parts
- SME 33/40/50 Sammic mixer spare parts
- Sammic AE-15/25/50 mixer spare parts
- Sammic AE-10/22/32 mixer spare parts
- Sammic AE-42C mixer spare parts
- Sammic AE-42SM mixer spare parts
- Sammic AE-62C mixer spare parts
- Sammic AE-62SE mixer spare parts
- Spare parts Sammic mixers DM-10
- Sammic spare parts for the mixer DM-20
- Sammic spare parts for the mixer DM-33/40/50
- Sammic spare parts for the mixer DM-75
- Spare parts for the Sammic DME-20 hook mixer
- Spare parts for the hook mixer Sammic DME-33/40/50
- Sammic fermentation cabinets spare parts ›
- Gyros Sammic rotisserie parts ›
- Sammic water bath parts ›
- Sammic gas barbecues spare parts ›
- Sammic scale spare parts ›
-
Sammic planetary mixer spare parts
›
- Spare parts for mixers Sammic BE-10 / BE10-C
- Sammic BE-20 / BE-20I / BE20-C Mixer-Mixer Spare Parts
- Sammic BE-30 / BE-30I / BE-30C Mixer-Mixer Spare Parts
- Spare parts for mixer BE-40 / BE-40C
- Sammic BM-5 / BM-5E blender-mixer spare parts
- Spare parts for blender-mixer BM-11
- Spare parts for blender-mixer BM-21 / BM-21C
- Sammic Bm-22 / c / s / h / hi / hc blender-mixer spare parts
- Spare parts for blender-mixer BM-41
- Spare parts for blender-mixer BM-42
- Sammic B-8 blender spare parts
- Sammic BM-20 blender spare parts
- Sammic BE-20/40 Blender trolley spare parts
- Sammic drink mixer parts ›
-
Sammic coffee maker spare parts
›
- Sammic B-5/10/20/40 quick filter coffee maker spare parts
- Spare parts Quick filter coffee maker Sammic ISO / TH / THa
- Spare parts Quick filter coffee maker Sammic MATIC 2/3 (> = 2010)
- Spare parts Quick filter coffee maker Sammic MATIC 2/3 <2010
- Spare parts Quick filter coffee maker Sammic NOVO / MONDO (> = 2010)
- Spare parts Quick filter coffee maker Sammic NOVO / MONDO <2010
- Sammic RST espresso machine spare parts
- Sammic filter coffee makers spare parts (ant.95)
- Sammic Unic espresso machines spare parts
- Spare parts Filter coffee machine Sammic RLX-4/8
- Spare parts Water heater HWA-20/40/70 Sammic
- Sammic manual potato slicer spare parts ›
-
Sammic meat and deli slicers spare parts
›
- Sammic CC-350 meat slicer spare parts
- Sammic CCE-350 meat slicer spare parts
- Sammic VE-300 meat slicer spare parts
- Sammic CR-142/143 slicer spare parts
- Sammic VDC-350 meat slicer spare parts
- Sammic GA-300/350 meat slicer spare parts
- Sammic GAE meat slicer spare parts
- Spare parts slicer Sammic GE-300/350
- Repuestos cortadora de fiambre Sammic GL-300 / 350
- Sammic GC meat slicer spare parts
- Sammic GCP-250/275 meat slicer spare parts
- Sammic GCP-300/350 meat slicer spare parts
- Spare parts for cutter CR-130 (Old)
- Spare parts for Sammic GSL-300 slicing machine
- Sammic GSL-350 slicing machine
- Sammic Gl-300 slicing machine
- Spare parts for meat cutters GSM-250/275/300
- Spare parts for GSS-250/275/300 meat cutters
- Spare parts for meat cutters GGS-300/350
-
Sammic vegetable slicers spare parts
›
- CA-25 vegetable cutter spare parts
- CA-300/400 vegetable slicer spare parts
- Spare parts for vegetable slicer Sammic CA-301
- CA-401 vegetable slicer spare parts
- CA-601 vegetable slicer spare parts
- Spare parts combined cutter-cutter CK-301/311/302/312
- Spare parts combined cutter-cutter CK-401/411/402/412
- CR-141 / CR-140 vegetable slicer spare parts
- Spare parts Vegetable slicer Sammic CA-301 VV
- Sammic CA-401 W vegetable slicer spare parts
- Sammic CA-311 vegetable slicer spare parts
- Sammic CA-411 vegetable slicer spare parts
- Sammic CA-611 vegetable slicer spare parts
- Sammic CA-311 VV vegetable slicer spare parts
- Sammic CA-411 VV vegetable slicer spare parts
- Sammic spare parts Combined cutter CK-35/38
- Sammic Combi vegetable preparation-food processor CK-45/48 V spare parts
- Spare Parts vegetable slicer-Combi-Cutter CA-21/CK-241/K-41s Sammic
- Sammic Spare Parts Cutter/Combi CK-24
- Spare parts Vegetable slicer CA-3V Sammic
- Spare parts for the vegetable slicer Sammic CA-4V
- Spare parts for vegetable slicer Sammic CA-31
- Spare parts for the vegetable slicer Sammic CA-41
- Spare parts for the vegetable slicer Sammic CA-62
- Spare parts for vegetable cutter Sammic CA-2V/KE-4V/CK-24V
- Spare parts for Sammic CA-21/K-41/CK-241 vegetable slicer cutter
- Sammic bread slicers spare parts ›
- Sammic crepe maker spare parts ›
- Gyros Sammic knives spare parts ›
- Sammic beverage dispenser parts ›
-
Sammic electroportable spare parts
›
- Spare Parts Electroportatiles 330
- TR-200/250 TR / BM-250 Electroportal Parts
- Spare Parts Electroportatiles 350/550/750
- Repuestos Electroportatiles SMX-450 / 500 / 600
- TR-220/270 TR / BM-270 Electroportable Spare Parts
- Spare parts for Sammic arm crushers
- Spare parts for the arm beaters Sammic line XM-21, XM-22, MB21, B20
- Spare parts for the arm beaters Sammic line XM-30, XM-31, XM-32, XM-33, BA-30
- Spare parts for Sammic electroportable XM-50 line
- Spare parts for Sammic electroportable XM-70 line
- Spare parts for Sammic electroportable XM-20 line
- Sammic vacuum packaging machine parts
- Sammic Vegetable Drainer Refills ›
- Sammic EC-30 Knife Sterilizer Spare Parts
- Sammic juicer parts ›
- Sammic insect killer parts ›
- Sammic hamburger forming parts ›
- Sammic dough forming spare parts ›
-
Sammic fryers spare parts
›
- Sammic FG-12 gas fryer spare parts
- Sammic FG-15 gas fryer spare parts
- Sammic FG-15 + 15 gas fryer spare parts
- Sammic FG-18 gas fryer spare parts
- Sammic FGS-15/15 + 15 gas fryer spare parts
- Sammic Bertos fryer spare parts
- Sammic F-10/10 + 10 fryer spare parts
- Sammic F-3/3 + 3 fryer spare parts
- Sammic F-8/8 + 8 fryer spare parts
- Sammic FE-12/12 + 12 fryer spare parts
- Spare parts fryer Sammic FE-12/12 + 12 (2006)
- Sammic FE-15 fryer spare parts
- Sammic FE-15 + 15 fryer spare parts
- Sammic FE-18/18 + 18 fryer spare parts
- Sammic FE-3 fryer parts
- Sammic FE-3 + 3 fryer spare parts
- Sammic FE-4/8 fryer spare parts
- Sammic FE-6 fryer parts
- Sammic FE-6 + 6 fryer spare parts
- Sammic FE-9 fryer spare parts
- Sammic FE-9 + 9 fryer spare parts
- Sammic FEM-8/8 + 8 fryer spare parts
- Sammic FEM-9/9 + 9/15/15 + 15 fryer spare parts
- Sammic FES-15/15 + 15 fryer spare parts
- Sammic FS-10 modular fryer spare parts
- Sammic FS-10 + 10 modular fryer spare parts
- Sammic FSG-10 modular fryer spare parts
- Sammic FSG-10 + 10 modular fryer spare parts
- Sammic SF-4/8/15 fryer spare parts
- Sammic SFM-8/8 + 8/9/9 + 9 fryer spare parts
- Sammic FE-8 fryer spare parts
- Sammic FE-8 + 8 fryer spare parts
- Spare parts for Sammic PF-6/6+6 fryers
- Spare parts for Sammic 10/10+10 fryers
- Sammic gas stove spare parts ›
-
Sammic gastronorm ovens spare parts
›
- Mixed Gastronorm Oven Spare Parts HV-1110 Sammic
- Mixed Gastronorm Oven Spare Parts HV-116 Sammic
- Mixed Gastronorm Oven Spare Parts HV-235 Sammic
- Spare Parts Gastronorm Oven Mixed OV-1110 Sammic
- OV-116 Sammic Mixed Gastronorm Oven Spare Parts
- Sammic OV-235 Mixed Gastronorm Oven Spare Parts
- Spare Parts Gastronorm Oven Mixed SO-1211 Sammic
- Spare Parts Gastronorm Oven Mixed SO-523 Sammic
- Spare Parts Gastronorm Oven Mixed SO-711 Sammic
- Spare Parts Gastronorm Multifunction Oven HX-234 Sammic
-
Sammic microwave ovens spare parts
›
- Sammic HM-9500 microwave / convection oven spare parts
- Sammic HM 1000 microwave oven spare parts
- Sammic HM 1001 microwave oven spare parts
- Sammic HM 1003 microwave ovens spare parts
- Sammic HM 1010 microwave oven spare parts
- Sammic HM 1035 microwave oven spare parts
- Sammic HM 1300 / ERG microwave oven spare parts
- Sammic HM 1800 microwave oven spare parts
- Sammic HM-1830 microwave oven spare parts
- Sammic HM-1900 microwave oven spare parts
- Sammic HM-2000 microwave oven spare parts
- Sammic HM / HMG-800/900/901/902 microwave oven spare parts
- Sammic HM / HMG-910 microwave oven spare parts
- Spare parts for microwave oven Sammic MO-1000
- Spare parts for microwave oven Sammic MO-1000M
- Spare parts for microwave oven Sammic MO-1817
- Spare parts for microwave oven Sammic MO-1834
-
Sammic pizza oven spare parts
›
- Sammic FPG Gas Pizza Ovens Spare Parts
- Sammic FP Pizza Ovens Spare Parts
- MINI Sammic Pizza Ovens spare parts
- Pizza Ovens MINI 4T Sammic spare parts
- Spare parts Pizza ovens PL Sammic
- Spare parts Pizza ovens PL-W Sammic
- Spare parts for Sammic pizza ovens 1+1/32
- Spare parts for Sammic pizza ovens 1+1/45
- Spare parts for pizza ovens Sammic PO-4/4/4+4
- Spare parts for pizza ovens Sammic PO-6/6+6
- Spare parts for Sammic pizza ovens PO-6W/6+6W
- Spare parts for pizza ovens Sammic PO-9/9+9
- Sammic snack ovens spare parts ›
- Sammic other ovens spare parts ›
- Sammic dishwashing spare parts
- Sammic blender spare parts ›
- Sammic cookware spare parts ›
-
Sammic potato peelers spare parts
›
- Potato peeler M-10 / M-15 / PE-15
- Potato peeler M-25 (2005)
- Potato peeler M-25 / M-25 F (<1999)
- Potato peeler M-26
- Potato peeler M-5
- Potato peeler M / C-6/12
- Potato peeler PI-10 / PI-15 / PES-18 (> 2013)
- Potato peeler PI-10/20 / PES-20 (=> 2013)
- Potato peeler PI-30
- Potato peeler PP / PPC-6/12 +
- PP / PPC potato peeler - Lav. mussels LM-6
- Peeler M-18 / M-28
- Spare parts C. support / filter M-25 (2005) / M- 26 Sammic
-
Sammic meat mincer spare parts
›
- Sammic HM-70/71 meat mincer spare parts
- Sammic P-12 meat mincer spare parts
- Sammic P-22 meat mincer spare parts
- Sammic P-22/32 (2000) meat mincer spare parts
- Sammic PC-12 meat mincer spare parts
- Sammic PC-22/32 meat mincer spare parts
- Sammic PS-12 meat mincer spare parts
- Sammic PS-22/32 meat mincer spare parts
- Sammic PS-22 / 32R REFRIGERATED meat mincer spare parts
-
Sammic mincer-cutter spare parts
›
- Spare parts mincer-cutter Sammic L-3 (2004)
- Spare parts chopper-cutter Sammic L-3 (<05/2004)
- Spare parts mincer-cutter Sammic L-5/8 (2004)
- Sammic SK-3 / SKE-3 mincer-cutter spare parts
- Sammic SK-5/8 / SKE-5/8 mincer-cutter spare parts
- Sammic K-3 / K-5 / K-8 mincer-cutter spare parts
- Sammic CK / CKE-5/8 Cutter Spare Parts
- Spare parts for cutter Sammic K/KE-5/8
- Sammic heating plates spare parts ›
- Sammic plates spare parts ›
- Sammic mash press spare parts ›
- Sammic salamander spare parts ›
- Sammic bone saw spare parts ›
- Sammic thermos spare parts ›
- Sammic tray sealers spare parts
-
Spare parts for Sammic bread toasters
›
- Sammic ST-1 / C-20VS bread toaster spare parts
- Sammic ST-2 bread toaster spare parts
- Sammic ST-250 / ST-350 bread toaster spare parts
- Sammic ST-251 / ST-351 bread toaster spare parts
- Repuestos tostador de pan Sammic ST-252/352
- Sammic STT bread toaster spare parts
- Sammic TP-10 / TP-20 bread toaster spare parts
- Sammic TPS-1 / TPD-2 bread toaster spare parts
- Spare parts for Sammic ST-22 bread toaster
- Spare parts for Sammic ST-33 bread toaster
- Spare parts for Sammic TP-100 bread toaster
- Spare parts for Sammic TP-200 Bread toaster
- Sammic beverage grinder parts ›
- Sammic Ice Crusher Spare Parts ›
- Sammic turbo shredder spare parts ›
-
Garhe Spare parts
›
-
Repuestos_cortadoras_de_fiambres_Garhe
›
- Repuestos_cortadora_de_fiambres_semiprofesional_Garhe_220_mm_08608
- Repuestos_cortadora_de_fiambres_semiprofesional_Garhe_250_mm_08606
- Repuestos_cortadora_de_fiambres_profesional_Garhe_250_mm_08606
- Repuestos_cortadora_de_fiambres_profesional_300_mm_08607
- Repuestos_cortadora_de_fiambres_profesional_Garhe_G220_08685
- Repuestos_cortadora_de_fiambres_profesional_Garhe_G250_08686
- Repuestos_cortadora_de_fiambres_profesional_Garhe_G250_086861
- Repuestos_cortadora_de_fiambres_Garhe_G300_08602
- Repuestos_cortadora_de_fiambres_Garhe_antigua_08605
- Repuestos_cortadora_de_fiambres_Garhe_mod_08604
- Repuestos_cortadora_de_fiambres_Garhe_08689
-
Repuestos_maquinas_tomateras_garhe
›
- Repuestos_trituradora_de_tomates_Tommy_de_Garhe_05205
- Repuestos_trituradora_multiusos_Garhe_05220
- Repuestos_tomatera_manual_hierro_fundido_Garhe_05005
- Repuestos_tomatera_picadora_ralladora_Sigma_06250
- Repuestos_tomatera_electrica_Garhe_GP3_06035
- Repuestos_tomatera_electrica_Garhe_GP5
- Repuestos_Tomatera_manual_Maxtom_de_Garhe_05240
- Repuestos_picadoras_manuales_Garhe
- Repuestos_picadora_Sigma_de_Garhe
- Repuestos_embutidoras_Garhe ›
- Spare parts for Garhe churros machines
-
Repuestos_otros_productos_Garhe
›
- Repuestos_hornillo_vulvano_de_Garhe
- Repuestos_molino_electrico_Garhe_00855
- Repuestos_para_molino_prensa_Garhe
- Repuestos_sierra_de_cinta_SC750_Gahre
- Repuestos_para_el_molino_de_prensa_Garhe_00820
- Repuestos_sacacorchos_mural_garhe
- Repuestos_trituradora_de_maiz_Garhe
- Repuestos_mezcladoras_de_carne_Garhe
- Repuestos_para_la_clipadora_manual_para_embutidos_Garhe_08570
-
Repuestos_cortadoras_de_fiambres_Garhe
›
-
Talsa spare parts
›
-
Spare parts for Talsa meat mixers
›
- Spare parts for Talsa mixers MIX30
- Spare parts for Talsa MIX35 mixers old range
- Talsa MIX40S Suprem mixer spare parts
- Spare parts for Talsa MIX60 mixers old range
- Spare parts old Talsa mixer MIX55
- Spare parts for Talsa mixers MIX65
- alsa MIX65S Suprem mixer spare parts
- Spare parts for Talsa MIX80 mixers
- Spare parts for Talsa mixers MIX95
- Spare parts old Talsa mixer MIX90
- Spare parts for the Talsa MIX95, Suprem range
- Spare parts for Talsa MIX100 mixers
- Spare parts for Talsa MIX150 mixers
- Spare parts for Talsa mixers MIX165
- Talsa MIX165S Suprem mixer spare parts
- Spare parts for Talsa MIX200 mixers
- Spare parts for Talsa MIX275 mixers
-
Spare parts for Talsa cutters
›
- Spare parts for cutter Talsa K15neo current range
- Spare parts for cutter Talsa K30neo current range
- Spare parts for cutter Talsa K50neo current range
- Spare parts for cutter Talsa K80neo current range
- Spare parts for cutter Talsa K120neo current range
- Spare parts for cutter Talsa K200neo current range
- Spare parts for cutter Talsa K15e old range
- Spare parts for cutter Talsa K30e old range
- Spare parts for cutter Talsa K50e old range electronic brake
- Spare parts for cutter Talsa K50e old range mechanical brake
- Spare parts for cutter Talsa K80e old range mechanical brake
- Spare parts for cutter Talsa K80v old range
- Spare parts for cutter Talsa K120v old range
-
Spare parts for Talsa embossing machines
›
- Spare parts Talsa F14 current range
- Spare parts Talsa F25 current range
- Spare parts Talsa F35 current range
- Spare parts Talsa F50 current range
- Spare parts Talsa H15 old range
- Spare parts Talsa H20 old range
- Spare parts Talsa H26 old range
- Spare parts Talsa H31 old range
- Spare parts Talsa H42 old range
- Spare parts Talsa H52 old range
-
Spare parts for Talsa cookers
›
- Spare parts electric cooker Talsa REA165
- Spare parts electric cooker Talsa REA250
- Spare parts electric cooker Talsa REA335
- Spare parts electric cooker Talsa REA505
- Spare parts electric cooker Talsa REA725
- Talsa RGA165 gas cooker spare parts
- Talsa RGA250 gas cooker spare parts
- Talsa RGA335 gas cooker spare parts
- Talsa RGA505 gas cooker spare parts
- Talsa RGA725 gas cooker spare parts
- Spare parts electric cooker Talsa ME120 old game
- Spare parts electric cooker Talsa ME200 old game
- Spare parts electric cooker Talsa ME300 old game
- Spare parts electric cooker Talsa ME400 old game
- Spare parts electric cooker Talsa ME500 old game
- Spare parts for gas cooker Talsa MG120 old game
- Spare parts for gas cooker Talsa MG200 old game
- Spare parts for gas cooker Talsa MG300 old game
- Spare parts for gas cooker Talsa MG400 old game
- Spare parts for gas cooker Talsa MG500 old game
-
Spare parts for Talsa meat grinders
›
- Spare parts meat grinder Talsa W22 current range
- Spare parts meat grinder Talsa W82 current range
- Spare parts meat grinder Talsa W32 current range
- Spare parts meat grinder Talsa W98 current range
- Spare parts meat grinder Talsa W114 current range
- Spare parts meat grinder Talsa W130 current range
- Spare parts meat grinder Talsa W22 old range
- Spare parts meat grinder Talsa W82 old range
- Spare parts meat grinder Talsa W32 old range
- Spare parts meat grinder Talsa W98 old range
- Spare parts meat grinder Talsa W114 old range
- Spare parts for Talsa PF-500 / PH-500
- Talsa Spare parts old discontinued products
-
Spare parts for Talsa meat mixers
›
- Lacor spare parts
-
Mundigas spare parts
›
- Spare parts Mundigas churrera CH-1-D 1,5 KG
- Spare parts for Mundigas brand cookers
- Spare parts for Mundigas gas griddles
- Spare parts for electric griddles
- Barbecue spare parts
- Gas fry-top spare parts
- Electric fry-top spare parts
- Paella pan spare parts
- Spare parts churro machine CH-6 4,5 KG
- Spare parts for Mundigas electric fryers
- MCM spare parts ›
-
Sammic Spare parts
›
- Technical service
Your basket is empty.
The house of mincers Food preparation Tomato grinder and grouting device Tomato crushing machine, chopper, grater, Sigma (06280)
Tomato crushing machine, chopper, grater, Sigma (06280)
Product no.: pic45
In stock
can be shipped within 3 days
Tomato crushing machine, meat grinder and grater Sigma (06280) Version 2017-2018
High-power multi-function appliance with semi-professional gear inverter.
Valid as meat grinder, stuffer, tomato crusher, grater and even biscuit all in the same product thanks to its wide
Includes as standard:
- 2 speed motor (inverter)
230V voltage. - 50 Hz
Power 500 W. (Max.1200 W.)
As a mincer
Mincer and stuffer # 5 with three plates of 5, 7 and 10 mm ..
- Polishing aluminum polishing head.
- Dishwasher-safe plastic tray
- Blade and plates made of stainless steel
- Funnel and pusher block in plastic.
As a tomato crusher
For tomatoes, peppers, fries and all kinds of jams.
- Grater head
- Stainless steel grid.
- Plastic block.
As a grater
- Two drums for grating bread, cheese, etc.
- A drum for cutting vegetables, vegetables, etc.
Customer ratings for Tomato crushing machine, chopper, grater, Sigma (06280)
Number of ratings: 5
Average rating: 3.6
Average rating: 3.6
Muy mala compra.
from Anonymous on 07/25/2017
from Anonymous on 07/25/2017
Se atasca mucho y hay que estar continuamente limpiandola. Yo he optado por comprarme otra tomatera como la que tenia de 18 € y manual que separaba perfectamente el peyejo y las petitas y no se atascaba nunca,
correcto
from Anonymous on 06/22/2016
from Anonymous on 06/22/2016
no tritura les grosellas se tapona amb les llavors
Muy aceptable.
from Anonymous on 05/18/2016
from Anonymous on 05/18/2016
Todavía está por ver.
Se la ve robusta y su presencia es buena, aunque me hubiera gustado que todos sus elementos fueran metálicos.
Se la ve robusta y su presencia es buena, aunque me hubiera gustado que todos sus elementos fueran metálicos.
All incoming ratings are posted by actual shop visitors / webshop customers and their content is checked by the operator by means of a visual inspection.
Accessories
| Product | Note | Status | Price | ||
|---|---|---|---|---|---|
|
|
6.50 € * | |||
|
*
Display accessory details
Prices incl. VAT, plus delivery
|
|||||
PIC30We also recommend
 |
 |
*
Prices incl. VAT, plus delivery
Browse this category: Tomato grinder and grouting device
Copyright © 2009 - 2024
Tomato crushing machine, chopper, grater, Sigma