The QCN-FL4B-P304-01 from Qualwave is a RF Connector with Frequency DC to 6 GHz, Operating Temperature -55 to 125 Degree C, Pin Diameter Dia. 3.04 mm, Voltage Rating 1500 V (rms), VSWR 1.25:1. Tags: Standard. More details for QCN-FL4B-P304-01 can be seen below.