2pcs SMA Male Plug (Male Pin) to RP-SMA Female (Male Pin) Coupling nut Connector Adapter for FPV Drone/ 0-6G RF application Wi-Fi Antenna Connect amplifier Signal Booster/Repeaters/Radio/Extension Cable etc. to antenna This adapter allows you to connect a cable with a RP-SMA male connector (socket in center, internally threaded nut) to a standard SMA female chassis connector (socket in center, externally threaded barrel). Pure Copper with Great connectivity.(Not Alloy) Impedance:50ohm Package inclue item:2pcs Warranty:1 Year