MPQ4540 Features: * Ground clamp * Adaptors have serrations that match the serration of ground clamp * Manufactured from cast copper alloy * Supplied with steel screws, plated for corrosion resistance * Provides maximum conductivity and strength * Used to connect armored or unarmored wire to water pipe for grounding * UL listed * Water pipe range: 0.5-1"" * Wire range: 8-4/0 * Box quantity: 25 Warranty: * 1 Year warranty