The DI-1748-458 from RF & Noise Components is a RF & Microwave Isolator with Frequency 1.71 to 1.78 GHz, Average Power Forward 250 W, Average Power Reverse 100 W, Insertion Loss 0.25 to 0.3 dB, Isolation 20 to 23 dB. Tags: Drop-In, Drop-In Isolator. More details for DI-1748-458 can be seen below.