Vacuum Cups and Suction Cups Model: Universal Flat Series Part Number: PF6-SI (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 PF6-SI (Silicone) 0.24 in. (6.1 mm) 0.24 in. (6 mm) – 0.47 in. (12.0 mm) 78 grams