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 F52-SITSilicone 2.05 (52.0) 0.31 (7.8) 0.87 (22.0) 0.69 (17.5) 0.427 (7.00) 15.10 (6.8)