The ID4300C from Orion Microwave Inc. is a RF & Microwave Isolator with Frequency 4.2 to 4.4 GHz, Average Power 35 W, Average Power Forward 35 W, Average Power Reverse 20 W, Peak Power Forward 0.5 kW. Tags: Drop-In, Drop-In Isolator. More details for ID4300C can be seen below.