The RFSL2183 from RF-CI is a RF & Microwave Isolator with Frequency 325 to 400 MHz, Average Power Forward 200 W, Average Power Reverse 20 W, Peak Power Forward 1 kW, Insertion Loss 0.4 to 0.5 dB. Tags: Drop-In, Drop-In Isolator. More details for RFSL2183 can be seen below.