The ESCU1350 from Star Microwave is a RF & Microwave Circulator with Frequency 9 to 18 GHz, Average Power Forward 50 W, Insertion Loss 0.5 dB, Isolation 18 dB, Operating Temperature -20 to 75 Degree C. Tags: Coaxial Circulator. More details for ESCU1350 can be seen below.