The C1HD1L from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.11 to 1.39 GHz, Average Power 10 to 50 W, Average Power Forward 10 to 50 W, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for C1HD1L can be seen below.