FURUTECH FI-28(G) High End Performance IEC Connector RATING 10A 250V /15A 125V AC 24k Gold-plated conductors  (Alpha) pure-copper Earth (Ground) Jumper System (US Patent No.: 6,669,491) Nylon/fiberglass body incorporating carbon particles that absorb vibration and resonance Specified for cable diameters from 6.6mm to 17.5mm Dimensions: FI-28(G)---39.6mm diameter x 76.2mm overall length Metal cable clamp improves grip and reduces mechanically and electrically induced distortion