SMA Female to Female Barrel Adapter RF Coax Connector Straight Pack of 2 Fits Many Baofeng, Woxon and Puxing Radios & allows Male SMA antennas to fit Radio You Can Use Small Wrench to Tighten This Connector with the Middle Part,The connector housing and pin in center are made of pure brass to ensure a lower VSWR for higher transmission efficiency These adapters are really handy, especially if you have Baofeng radios as they have a male SMA on the radios and a female SMA on the antennas Impedance50, Insertion loss0.15dB/3GHz,VSWR1.1 Package Content : 2 x SMA Female to Female Coaxial Adapter