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 F5-SITSilicone 0.21 (5.4) 0.15 (3.9) 0.35 (9.0) 0.31 (8.0) 0.002 (0.03) 0.20 (0.0)