The QCN-FL4B-T50-1 from Qualwave is a RF Connector with Frequency DC to 18 GHz, Connector Length 39.2 mm ( L ), Operating Temperature -55 to 165 Degree C, Voltage Rating 1000 VDC, VSWR 1.30:1. Tags: Standard. More details for QCN-FL4B-T50-1 can be seen below.