Pipe Bronze ground clamps are for bonding bare copper wire to water pipe or for use as a water meter shunt. They will fit ground wires 10 sol to 2/0 str and water pipes 1/2 to 6 inches. Zinc plated steel screws.

Pipe Size: 2 1/2- 4
Ground wire range: 10 SOL - 2 STR
cULus listed 467 grounding and bonding
UL467 Listed, Grounding & Bonding