The RFLI-305-3 from RF-Lambda is a RF & Microwave Isolator with Frequency 2 to 4 GHz, Bandwidth 250 MHz, Average Power Forward 500 W, Insertion Loss 0.3 dB, Isolation 20 dB. Tags: Module with Connector, Coaxial Isolator. More details for RFLI-305-3 can be seen below.