The RFSL6164 from RF-CI is a RF & Microwave Isolator with Frequency 450 to 500 MHz, Average Power Forward 200 W, Average Power Reverse 20 W, Peak Power Forward 2 kW, Insertion Loss 0.3 to 0.4 dB. Tags: Module with Connector, Coaxial Isolator. More details for RFSL6164 can be seen below.