The ETCE0225-X from Star Microwave is a RF & Microwave Circulator with Frequency 2.1 to 2.4 GHz, Average Power Forward 250 W, Average Power Reverse 100 W, Insertion Loss 0.18 dB, Isolation 21 dB. Tags: Drop-in Circulator. More details for ETCE0225-X can be seen below.