The 991-210250-851 from M2 Global Technology is a RF & Microwave Isolator with Frequency 2.1 to 2.5 GHz, Average Power Forward 25 W, Average Power Reverse 100 W, Insertion Loss 0.6 dB, Isolation 35 dB. Tags: Drop-In, Drop-In Isolator. More details for 991-210250-851 can be seen below.