All metal construction, anti-corrosion nickel-plated. More reliable and easier to use than traditional hex crimp BNC connectors. Designed to provide a professional, secure, waterproof connection for RG59 coaxial cable. 360° radial compression provides superior RF integrity. Wide operating band from 0.3 MHz to 3 GHz. Suitable for use in the CCTV, structured cabling, home theater, audio & video entertainment industries. Impedance: 50ohm Material: Metal Quantity: 50pcs Per item size: 37.3 * 14 * 14mm / 1.4 * 0.5 * 0.5in Package List: 50 x Pieces of BNC Compression Connector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.