The RFLI-309-1 from RF-Lambda is a RF & Microwave Isolator with Frequency 2.5 to 4 GHz, Average Power Forward 30 W, Average Power Reverse 2 W, Insertion Loss 0.3 dB, Isolation 23 dB. Tags: Module with Connector, Coaxial Isolator. More details for RFLI-309-1 can be seen below.