W5SWL Brand Premium Series BNC Female to UHF PL-259 Female RF Radio Adapter Connector - by W5SWL Brand BNC Female to UHF Female Adapter Connector Delrin Insulator, Gold Plated RF Pin, Nickle Plated Body Impedance: 50 Ohms Used for connecting a BNC Male to a UHF PL-259 Series Male by W5SWL Brand is Trademarked - Sold only by Dave's Hobby Shop and NO others. Premium Communications Connectors - not for Cable TV