Vacuum Cups and Suction Cups Product Photo (Click to Enlarge) Vacuum Cup Part Number and Material D Overall Dia. in. (mm) d Fitting Dia. in. (mm) H Static Height in. (mm) A Compressed Height in. (mm) Volume in. (cm) Capacity* lb. (kg) 2 to 1 Fitting Group Suspensions Group RFQ F20-SITSilicone 0.79 (20.0) 0.18 (4.5) 0.45 (11.5) 0.33 (8.5) 0.027 (0.44) 2.20 (1.0)