Permaground U-Bolt Ground Clamp, Mechanical connection, Copper material, UL 467 Listed, C22.2 No. 65-03, Copper Primary Conductor 2/0 Str - 4 Str and 2/0 Sol - 4 Sol, 1 conductors, 1 ports/wireways, pipe size 2-1/2, Drive Type Main 3/8 External Hex, 2-1/2, 2-5/8, 2-3/4, 2-7/8 nominal ground rod,