DHT Electronics 2pcs RF coaxial coax adapter UHF female to female SO-239 SO239 Package Content : 2 x UHF female Adapters Nickel plated and designed to offer the lowest VSWR rating of the two series Connector Material:Pure brass with LOW LOSS.(Not Alloy) Impedance:50ohm S0-239 UHF female connector.Used for connecting two PL-259 connectors together.