Riser Clamp, Bolt Diameter 25/64 in, Bolt Length 25/64 in, Clamp Material Steel, Clamp Material Finish Electrogalvanized, For Maximum Outside Diameter 3 1/2 in, For Pipe Size 3 in, Load Capacity 530 lb, Mounting Hole Diameter 0.39 in, Overall Height 1 in, Overall Length 11.75 in, Overall Width 1 in, For Use On Pipe, Standards MSS SP-58, Type 8, WW-H-171, Type 8, Bolt Center-to-Center Length 8 1/8 in