Amphenol RF HD-BNC to MCX 12G Adapters are designed with PTFE insulation material and comes with an impedance of 75Ω. These adapters operate up to 12GHz frequency and are built with beryllium copper as the contact material. The HD-BNC to MCX 12G adapters provide 500VRMS of dielectric withstanding voltage and are durable up to 500 cycles.