The 20.300.120-503 from CPE Italia S.p.a. is a RF Connector with Frequency DC to 11 GHz, Operating Temperature -55 to 125 Degree C, PIM -155 dBc, Voltage Rating 1000 Vrms, VSWR 1.30:1. Tags: Standard. More details for 20.300.120-503 can be seen below.