The T1AK3 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.61 to 1.627 GHz, Average Power 5 to 8 W, Average Power Forward 5 to 8 W, Insertion Loss 0.4 dB, Isolation 18 dB. Tags: Drop-In, Drop-In Isolator. More details for T1AK3 can be seen below.