The RFLI-312D-1 from RF-Lambda is a RF & Microwave Isolator with Frequency 2 to 4 GHz, Average Power Forward 50 W, Average Power Reverse 1 W, Insertion Loss 0.3 dB, Isolation 45 dB. Tags: Module with Connector, Coaxial Isolator. More details for RFLI-312D-1 can be seen below.