The NDI-4244 from Stellant Systems is a RF & Microwave Isolator with Frequency 4.2 to 4.4 GHz, Average Power Forward 1 W, Peak Power Reverse 1 W, Insertion Loss 0.3 to 0.4 dB, Isolation 20 to 23 dB. Tags: Drop-In, Drop-In Isolator. More details for NDI-4244 can be seen below.