The 891-180188-351 from M2 Global Technology is a RF & Microwave Isolator with Frequency 1.8 to 1.88 GHz, Average Power Forward 150 W, Average Power Reverse 10 W, Insertion Loss 0.25 dB, Isolation 21 dB. Tags: Drop-In, Drop-In Isolator. More details for 891-180188-351 can be seen below.