Furutech FI-15M Plus (R) High-Performance Rhodium-silver over copper male AC-plug Rhodium-plated  (Alpha) Pure copper Conductor Floating Field Damper System* prevents induced magnetic fields Nylon /fiberglass main body and inner cover plate. Polycarbonate cable damping clamp with stainless screws Specified for cable diameters of 6.6mm to 15.0mm (Wire size of 5.5mm2 (10AWG) max.) Connection: Set screw. Dimensions: 35.0mm X 34.0mm X 72.2mm overall length.