The T4XB2 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4.875 to 5.125 GHz, Average Power 10 W, Average Power Forward 10 W, Insertion Loss 0.3 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for T4XB2 can be seen below.