Riser Clamp Clamp Material Steel Clamp Material Finish Electrogalvanized For Maximum Outside Diameter 1 7/8 in For Pipe Size 1 1/2 in Load Capacity 255 lb Mounting Hole Diameter 0.438 in Overall Height 1 in Overall Length 9.88 in Overall Width 1 in For Use On Tube Standards MSS SP-58 Type 8