The PE83CR1021 from Pasternack Enterprises Inc is a RF & Microwave Circulator with Frequency 7 to 12.4 GHz, Average Power Forward 5 W, Average Power Reverse 5 W, Peak Power 20 W, Insertion Loss 1.2 dB. Tags: Coaxial Circulator. More details for PE83CR1021 can be seen below.