The DV1721 from DiTom Microwave is a Space Qualified Isolator with Frequency 17.30 to 21.20 GHz, Average Power Forward 15 W, Peak Power 30 W, Insertion Loss 0.45 dB, Isolation 22 dB. Tags: Module with Connectors, Coaxial Isolator. More details for DV1721 can be seen below.