Size18Suction cup materialSilicone SIMaterial hardness [Shore A]55 Shore AMaterial characteristicsFDA-compatibleNipple materialAluminumConnectionG1/8"-FNumber of folds2.5Vacuum connectionG1/8"-F KE-FSG 18 SI-55 G1/8-IGDesign Data Attribute Value d2 8 mm dn 3.50 mm Dmax(S) 19 mm Ds 17.20 mm G1 G1/8"-F H 34.60 mm LG1 8.50 mm SW1 14 mm Z (Stroke) 9 mm