Size18Suction cup materialNitrile rubber NBRMaterial hardness [Shore A]55 Shore ANipple materialAluminumConnectionG1/8"-MNumber of folds2.5Vacuum connectionG1/8"-M KE-FSG 18 NBR-55 G1/8-AGDesign Data Attribute Value d2 8 mm dn 3.50 mm Dmax(S) 19 mm Ds 17.20 mm G1 G1/8"-M H 28.60 mm LG1 7.50 mm SW1 14 mm Z (Stroke) 9 mm