Genuine Unistrut P2785-EG 1-5/8" U-Bolt Beam Clamp for All 13/16", 7/8" and 1-5/8" Tall Strut Channel Genuine UNISTRUT Brand 1-5/8" U-Shaped Strut to Beam Clamp; Use in Pairs Only For use with Beams up to 3/4" (19.1mm) Flanges For use with P1000,P1100,P2000,P3000,P3300,P3301,P4000,P4001,P4100 & P4101 and All 1-5/8"Channel Finish: Electro-Galvanized; ASTM B633, Type III