Low Loss BNC M-Male-Plug to UHF SO239 SO-239 F-Female-Jack RF Coaxial Coax Adapter, Handheld Handitalk Antenna Adapter Nickel Plated pure brass with great connectivity. (Not tin alloy) high quality adapter; won't compromise signal quality Compatible with Agilent, r&s, Tektronix and all other receiver Connectors are milled brass with nickel plating for durability 50 ohm impedance. If not purchased direct from Amazon please allow up to 25 days for shipping