The D4I2021 from DiTom Microwave is a RF & Microwave Isolator with Frequency 20 to 21.5 GHz, Average Power 10 W, Average Power Forward 10 W, Average Power Reverse 2 W, Peak Power Forward 0.05 kW. Tags: Module with Connector, Coaxial Isolator. More details for D4I2021 can be seen below.