The RFSL2257 from RF-CI is a RF & Microwave Isolator with Frequency 830 to 890 MHz, Average Power Forward 200 W, Average Power Reverse 20 W, Peak Power Forward 1 kW, Insertion Loss 0.2 to 0.3 dB. Tags: Drop-In, Drop-In Isolator. More details for RFSL2257 can be seen below.