Outer contact nickel plating for a bright, long-lasting, non-tarnishing finish Ideal BNC adapter for secure coaxial cable, Compatible with All CCTV Systems Make custom length video cables for home theater, broadcast video and CCTV. Material: Aluminum alloy, copper core Dimesion: 6 x 1.4cm / 2.4'' x 0.55' (L*max.D)