The 991-100110-501 from M2 Global Technology is a RF & Microwave Isolator with Frequency 1 to 1.1 GHz, Average Power Forward 150 W, Average Power Reverse 10 W, Insertion Loss 0.3 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for 991-100110-501 can be seen below.