ANVER Vacuum Cups and Suction Cups Model: Universal Flat Series Part Number: F20-NBR Vacuum Cup Part Number and Material D Flared Overall Dia. in. (mm) D Overall Dia. in. (mm) d Fitting Dia. in. (mm) H Static Height in. (mm) A Compressed Height in. (mm) Volume in. (cm) Load Capacity* 2 to 1 Fitting Group (Click Image for More Info) Suspensions Group (Click Image for More Info) F20-NBR (Nitrile) 0.83 (21.1) 0.79 (20.0) 0.16 (4.0) 0.45 (11.5) 0.33 (8.5) 0.027 (0.44) 1.4 lbs (0.64 Kg)