The 891-180188-551 from M2 Global Technology is a RF & Microwave Isolator with Frequency 1.8 to 1.88 GHz, Average Power Forward 200 W, Average Power Reverse 10 W, Insertion Loss 0.28 dB, Isolation 21 dB. Tags: Drop-In, Drop-In Isolator. More details for 891-180188-551 can be seen below.