The T1DK1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.02 to 1.04 GHz, Average Power 15 W, Average Power Forward 15 W, Peak Power 300 W, Insertion Loss 0.4 dB. Tags: Drop-In, Drop-In Isolator. More details for T1DK1 can be seen below.