ITEM NAME:1Pc SMA female to UHF female RF coaxial connector adapter SO239 SL16 RF BL J Bj.Connector B: UHF(SO239) Female. It is a solid UHF connector and Brass body material (Not Alloy) ensure higher signal transmission and connectivity. Connector A: SMA Female. Application for Antennas, Wireless LAN Devices, Coaxial cable, Wi-Fi Radios External Antenna and so on.