Size4Suction cup materialSilicone SIMaterial hardness [Shore A]55 Shore AMaterial characteristicsFDA-compatibleNipple materialAluminumConnectionM5-FNumber of folds2.5Vacuum connectionM5-FKE-FSG 4 SI-55 M5-IGDesign Data Attribute Value d2 2.40 mm dn 2 mm Dmax(S) 5.50 mm Ds 3.80 mm G1 M5-F H 24 mm LG1 5.50 mm SW1 8 mm Z (Stroke) 1.50 mm