Riser Clamp, Bolt Diameter 1/2 in, Bolt Length 1/2 in, Clamp Material Steel, Clamp Material Finish Copper-Plated, For Copper Tube Size 4 in, Load Capacity 300 lb, Mounting Hole Diameter 0.5 in, Overall Length 12.5 in, Overall Width 1 in, For Use On Tube, Maximum Operating Temperature 450 Degrees F, Standards MSS SP-58, Type 8, Cushion Material No Cushion, Cushioned No. This item has been restricted from sale in the following state (s): []