The RADC-1.35-1.75-Cryo-0.01-4K-S23-1WR-b from Raditek is a RF & Microwave Circulator with Frequency 1.35 to 2.6 GHz, Average Power Forward 1 to 10 W, Average Power Reverse 1 W, Insertion Loss 0.4 to 0.9 dB, Isolation 15 to 19 dB. Tags: Coaxial Circulator. More details for RADC-1.35-1.75-Cryo-0.01-4K-S23-1WR-b can be seen below.