The T4YR2 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4.4 to 5.15 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 T4YR2 can be seen below.