The QCS-FL4G-M from Qualwave is a RF Connector with Frequency DC to 26.5 GHz, Operating Temperature -55 to 165 Degree C, Pin Diameter Dia. 0.8, 0.38 mm, Voltage Rating 1000 VDC, VSWR 1.15:1. Tags: Standard. More details for QCS-FL4G-M can be seen below.