Riser Clamp Bolt Diameter 3/8 in Bolt Length 3/8 in Clamp Material Steel Clamp Material Finish Copper-Plated For Copper Tube Size 1 in Load Capacity 120 lb Mounting Hole Diameter 0.375 in Overall Length 9.31 in Overall Width 1 1/4 in For Use On Tube Maximum Operating Temperature 450 Degrees F Standards MSS SP-58 Type 8 Cushion Material No Cushion Cushioned No