The RFSL2125 from RF-CI is a RF & Microwave Isolator with Frequency 570 to 670 MHz, Average Power Forward 300 W, Average Power Reverse 20 W, Peak Power Forward 1 kW, Insertion Loss 0.35 to 0.5 dB. Tags: Drop-In, Drop-In Isolator. More details for RFSL2125 can be seen below.