The F2158 from WENTEQ Microwave Corp is a RF & Microwave Isolator with Frequency 4 to 8 GHz, Bandwidth 4000MHz, Average Power Forward 10 W, Average Power Reverse 1 W, Insertion Loss 0.5 dB. Tags: Module with Connector, Coaxial Isolator. More details for F2158 can be seen below.