The I311(X)T-(Z) - Circulator from Sinclair Technologies is a RF & Microwave Circulator with Frequency 406 to 512 MHz, Bandwidth 12 MHz, Average Power Forward 125 W, Insertion Loss 0.3 to 0.6 dB, Isolation 25 to 35 dB. Tags: Coaxial Circulator. More details for I311(X)T-(Z) - Circulator can be seen below.