This high-performance white keystone insert will couple two coaxial BNC male ended cables with ease, often used to make in-wall runs appear more professional. This 50 Ohm coupler is intended applications where higher voltage and power are needed such as TV or FM, two way radios, emergency frequencies like police and fire, microwave transmitters (6 GHz ceiling), ham radio, and more. These will provide a secure, flush-type (recessed) connection. The connections are secure, thanks to this nickel-plated product that is built to provide years of reliable, consistent use. This coupler is designed for use with all keystone style wall plates and standard BNC cables - it measures approximately 32.5+/-0.2 mm from end to end and weighs a feather light 0.04 lbs.