The RFLC-306-3 from RF-Lambda is a RF & Microwave Circulator with Frequency 1.8 to 4.2 GHz, Bandwidth Bandwidth: 400 MHz, Average Power Forward 10 W, Insertion Loss 0.5 dB, Isolation 18 dB. Tags: Drop-in Circulator. More details for RFLC-306-3 can be seen below.