The PE83IR1018 from Pasternack Enterprises Inc is a RF & Microwave Isolator with Frequency 2 to 4 GHz, Average Power Forward 10 W, Average Power Reverse 2 W, Insertion Loss 1 dB, Isolation 40 dB. Tags: Module with Connector, Coaxial Isolator. More details for PE83IR1018 can be seen below.