DHT Electronics RF coaxial coax adapter N female to UHF female SO-239 SO239 connector Package include:1 x adapter,photo shows 2 is for buyers to see it from different sides Commonly Used in RF Applications, Antennas, Wireless LAN Devices , Coaxial cable, Wi-Fi Radios External Antenna, &gt;1000 Times Mating Life Time. Impedance:50ohm Material:Pure brass with Great connectivity.(Not Alloy) DHT Electronics Brand is a Registered Trademark of DHT LLC.Only authorized seller of DHT Electronics can sell under DHT Electronics listings.