The RFSL2859 from RF-CI is a RF & Microwave Isolator with Frequency 3.3 to 3.8 GHz, Average Power Forward 100 W, Average Power Reverse 20 W, Peak Power Forward 1 kW, Insertion Loss 0.25 to 0.35 dB. Tags: Drop-In, Drop-In Isolator. More details for RFSL2859 can be seen below.