Copper with direct gold plating.For 8.7-9.4mm dia. cables. Uses compression to insure proper RF shielding and strain relief. Slide nut on cable. Strip 3/4” of jacket, cut shield to 1/4”, strip tip 1/2” of center conductor, fold shield back on jacket. Place compression collar over shield, solder center conductor to center pin, slide on ground crown, tighten outer barrel. Priced per pair.