The 891-180188-451 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 100 W, Insertion Loss 0.25 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for 891-180188-451 can be seen below.