The RFLC-101-1H-400-450S from RF-Lambda is a Space Qualified Circulator with Frequency 400 to 450 MHz, Bandwidth 50 MHz, Average Power Forward 50 W, Insertion Loss 0.3 to 0.35 dB, Isolation 21 to 22 dB. Tags: Module with Connector, Coaxial Circulator. More details for RFLC-101-1H-400-450S can be seen below.