The I211(X)T-(Z) - Circulator from Sinclair Technologies is a RF & Microwave Circulator with Frequency 138 to 174 MHz, Bandwidth 5 MHz, Average Power Forward 125 W, Insertion Loss 0.4 to 0.6 dB, Isolation 25 to 35 dB. Tags: Coaxial Circulator. More details for I211(X)T-(Z) - Circulator can be seen below.