Size52Suction cup materialSilicone SIMaterial hardness [Shore A]55 Shore AMaterial characteristicsFDA-compatibleNipple materialAluminumConnectionG1/4"-MNumber of folds2.5Vacuum connectionG1/4"-M KE-FSG 52 SI-55 G1/4-AGDesign Data Attribute Value d2 24.60 mm dn 4.40 mm Dmax(S) 55 mm Ds 52.50 mm G1 G1/4"-M H 52.70 mm LG1 11 mm SW1 17 mm Z (Stroke) 25 mm