The RFLC-228-1900 from RF-Lambda is a RF & Microwave Circulator with Frequency 1.89 to 1.92 GHz, Bandwidth Bandwidth: Full Band, Average Power Forward 100 W, Insertion Loss 0.3 dB, Isolation 23 dB. Tags: Drop-in Circulator. More details for RFLC-228-1900 can be seen below.