The RADI-1.35-1.75-Cryo-4-77°K-S3-1WR-b from Raditek is a RF & Microwave Isolator with Frequency 1.35 to 1.75 GHz, Average Power Forward 10 W, Average Power Reverse 1 W, Insertion Loss 0.4 dB, Isolation 19 dB. Tags: Coaxial Isolator. More details for RADI-1.35-1.75-Cryo-4-77°K-S3-1WR-b can be seen below.