The RADI-7.20-7.80-Cryo-77°K-S3-0.05WR-b from Raditek is a RF & Microwave Circulator with Frequency 7.2 to 10 GHz, Average Power Forward 0.5 W, Average Power Reverse 0.5 W, Insertion Loss 0.2 to 0.35 dB, Isolation 19 to 22 dB. Tags: Coaxial Circulator. More details for RADI-7.20-7.80-Cryo-77°K-S3-0.05WR-b can be seen below.