The RFSL3122 from RF-CI is a RF & Microwave Isolator with Frequency 430 to 460 MHz, Average Power Forward 200 W, Average Power Reverse 20 W, Peak Power Forward 1 kW, Insertion Loss 0.25 to 0.3 dB. Tags: Module with Connector, Coaxial Isolator. More details for RFSL3122 can be seen below.