Copper Ground Pipe Clamps - Serrated Collar 1-1/4" - 2" - These Copper Ground Pipe Clamps have a serrated collar to accomodate adaptors to ground armored cable or conduit to water pipes.Copper Ground Pipe Clamps - Serrated Collar 1-1/4" - 2" features include: Cast Copper Ground Pipe Clamps have serrations that would match the serrations of the armored cable or conduit adapters Used to Connect Copper Grounding Conductor to Water Pipe, Ground Rods amp; Copper Heater Tubing etc. Manufactured from High Conductivity Cast Copper alloy Supplied with Steel Screws, Zinc Plated for corrosion resistance Cast Copper pipe clamp provides maximum conductivity amp; strength cULus Listed Use with MORRIS Cat# 91603, 91604, 91605, 91606 Serrated Adaptors for Armored Cable or Conduit Grounding Applications Dimension Measurements = Inches Order Qty of 1 = 1 Piece Below is more info on our Copper Ground Pipe Clamps - Serrated Collar 1-1/4" - 2"