The RFSL3142 from RF-CI is a RF & Microwave Isolator with Frequency 270 to 335 MHz, Average Power Forward 200 W, Average Power Reverse 20 W, Peak Power Forward 1 kW, Insertion Loss 0.5 to 0.7 dB. Tags: Module with Connector, Coaxial Isolator. More details for RFSL3142 can be seen below.