The 35F-35M50+ from Mini circuits is 3.5 mm-Female to 3.5 mm-Male coaxial adapter which operates from DC to 34 GHz. It has an insertion loss of 0.12 dB, a VSWR from 1.07:1 to 1.25:1 and an impedance of 50 Ohms. It is used as a connection saver and a cable extender. It is housed in a passivated and rugged stainless steel body.