Vacuum Cups and Suction Cups Model: Universal Flat Series Part Number: PF9-SI Flat Cup, 9mm Flanged (Silicone) Vacuum Cup/ Suction Cup No. Flared Overall Dia. D Overall Dia. d Fitting Dia. H Static Height Load Capacity* at 24 in. Hg (609.6mm Hg) [2:1 Safety Factor] Recommended Fitting (Click for Info) RFQ Suspension Group for Cups PF9-SI Flat Cup, 9mm Flanged (Silicone) 0.37 in. (9.3 mm) 0.35 in. (9 mm) 0.18 in. (4.5 mm) 0.47 in. (12 mm) 160 grams NOTE: Previously called PF9-S45