DHT Electronics 2PCS RF coaxial coax adapter RP-SMA male to F female Package Include:2 x adapters Brass material(Not Alloy) and gold plated ensure higher signal transmission and connectivity Impedance :50 ohm Important Note:RP-SMA is NOT pin center,it is hole center Commonly Used in RF Applications, Antennas, Wireless LAN Devices , Coaxial cable, Wi-Fi Radios External Antenna, &gt;1000 Times Mating Life Time.