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 F30-SITSilicone 1.17 (29.7) 0.31 (7.8) 0.75 (19.1) 0.63 (16.0) 0.177 (2.90) 4.90 (2.2)