Vacuum Cups and Suction Cups Model: Universal Flat Series Part Number: PF13-SI Flat Cup 13mm 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) Suspension Group for Cups PF13-SI Flat Cup, 13mm Flanged (Silicone) 0.53 in. (13.5 mm) 0.51 in. (13 mm) 0.18 in. (4.5 mm) 0.48 in. (12 mm) 355 grams