The C-1S13U-50 from Teledyne Microwave Solutions is a RF & Microwave Circulator with Frequency 1.4 to 1.7 GHz, Average Power Forward 50 W, Peak Power 1000 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Coaxial Circulator. More details for C-1S13U-50 can be seen below.