SMA Female to UHF SO-239 female adapters. Gold-plated center pin and SMA side. Has an impedance of 50 ohms. This is very popular due to a lot of ham radios being adapted to the larger PL-259 cables and handy-talkies having the smaller and newer male SMA connectors on them such as the Chinese Wouxun handheld radios. Typical for many other high-frequency applications such as test equipment. A good inter-series adapter item to have "in the shack" or in the box.
This is an economical way to solve gender and connector type mismatches when interconnecting coaxial antenna equipment. Very well-made for the price!. Warranty: 1 year against defects by wiredco.com.