The SMC-3060 from Sierra Microwave Technology is a RF & Microwave Circulator with Frequency 3 to 6 GHz, Insertion Loss 0.5 dB, Isolation 18 dB, Operating Temperature -30 to 70 Degree C, Storage Temperature -65 to 125 Degree C. Tags: Coaxial Circulator. More details for SMC-3060 can be seen below.