The DNF1900-T0135 from Mercury Systems is a RF & Microwave Isolator with Frequency 1.81 to 1.881 GHz, Average Power 1 W, Average Power Forward 1 W, Peak Power Forward 1 W, Insertion Loss 0.3 dB max.. Tags: Drop-In, Drop-In Isolator. More details for DNF1900-T0135 can be seen below.