Riser Clamp Pipe Size 2 1/2 In Max Load 400 Lb Material of Construction Carbon Steel Length 11 1/4 In Bolt Size 7/16 In For Support Of Stationary Steel Pipe Risers Cast Iron Pipe Or Conduit. 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). UL ULC Listed.