Size53Suction cup materialNitrile rubber NBRMaterial hardness [Shore A]55 Shore ANipple materialAluminumConnectionG1/4"-FNumber of folds1.5Vacuum connectionG1/4"-FDesign DataKE-FSGA 53 NBR-55 G1/4-IGDesign Data Attribute Value d2 33 mm Dmax(S) 60 mm dn 4.40 mm Ds 50 mm G1 G1/4"-F H 49 mm LG1 12 mm SW1 17 mm Z (Stroke) 15 mm