Riser Clamp Tube Size 3/4 In Max Load 75 Lb Material of Construction Copper Plated Steel Length 7 In Bolt Size 5/16 In For Support And Steadying Of Copper Tube Risers Either Insulated Or Non-Insulated. Not Intended For Use With Hanger Rods. Standards A-A-1192A (Type 8) WW-H-171-E (Type 8) ANSI/MSS SP-69 and MSS SP-58 (Type 8).