Features:-Pack quantity: 10 couplers (FS-BNCF)-Primary use: Join two male BNC plugs — cable extension and quick repairs for video/RF runs-Applications: CCTV, SDI / HD-SDI, composite video and other 75 O coax installations-Typical construction: nickel-plated brass body with gold-plated centre contact (representative)-Coupling: BNC bayonet (plug-and-play)-Compatibility note: Designed for 75 O systems — maintain 75 O impedance consistency when adding adapters to a signal chain