The 1081-003 from Southwest Antennas is a RF & Microwave Isolator with Frequency 800 MHz to 1 GHz, Average Power Forward 150 W, Average Power Reverse 10 W, Peak Power Forward 300 W, Insertion Loss 0.30 dB. Tags: Module with Connector, Coaxial Isolator. More details for 1081-003 can be seen below.