Genuine Unistrut P1115-EG 1-1/2" Rigid Steel Conduit Pipe Strut Clamp for All 1-5/8" Strut Channels Genuine UNISTRUT Brand 1-1/2" Rigid Steel Conduit Pipe Clamp Slotted Hex Head Screw and Nut Included 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