The CCEK-26.5-40 from ESJ Technology is a RF & Microwave Circulator with Frequency 26.5 to 40 GHz, Average Power Forward 10 W, Insertion Loss 1.2 dB, Isolation 15 dB, Operating Temperature -30 to 70 Degree C. Tags: Coaxial Circulator. More details for CCEK-26.5-40 can be seen below.