The T4YR3 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4.4 to 5.25 GHz, Average Power 25 W, Average Power Forward 25 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for T4YR3 can be seen below.