Size20Suction cup materialNitrile rubber NBRMaterial hardness [Shore A]55 Shore ANipple materialAluminumConnectionG1/8"-MNumber of folds2.5Vacuum connectionG1/8"-MKE-FSG 20 NBR-55 G1/8-AGDesign Data Attribute Value d2 10.50 mm dn 3.50 mm Dmax(S) 21 mm Ds 20 mm G1 G1/8"-M H 28.10 mm LG1 7.50 mm SW1 14 mm Z (Stroke) 9 mm