Detailed Product Description strut clamps(rigid pipe clamps ,EMT pipe clamps)Type Size (u n i t: inch )Part # RIGID Series1/2" ~ 6"MP-1050, ~ MP-1600E.M.T. Series1/2" ~ 2"MPT-1050, ~ MPT-1200UNIVERSAL Series1/2" ~ 4"MP-6050, ~ MP-6400O.D.Series Tubing1/2" ~ 6"MT-1050, ~ MT-1600O.D.& Copper Tube Isolating7/8", 1-1/8"(developing now)Material: Standard carbon steel,conforming to ASTM A36, A575, A576 ...