The 991-990101-201 from M2 Global Technology is a RF & Microwave Isolator with Frequency 9.9 to 10.1 GHz, Average Power Forward 50 W, Average Power Reverse 50 W, Insertion Loss 0.3 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for 991-990101-201 can be seen below.