The QDI1919X from Qualwave is a RF & Microwave Isolator with Frequency 800 to 4300 MHz, Bandwidth 900 MHz, Average Power Forward 100 W, Average Power Reverse 20 W, Insertion Loss 0.30 to 0.50 dB. Tags: Drop-In, Drop-In Isolator. More details for QDI1919X can be seen below.