DHT Electronics 2pcs RF coaxial coax adapter SMA female to BNC female Package include:2 x adapters Material:Pure brass with Great connectivity.(Not Alloy) Impedance :50 ohm Commonly Used in RF Applications, Antennas, Wireless LAN Devices , Coaxial cable, Wi-Fi Radios External Antenna, &gt;1000 Times Mating Life Time. DHT Electronics Brand is a Registered Trademark of DHT LLC.Only authorized seller of DHT Electronics can sell under DHT Electronics listings.