The IS-37/NF from MCLI is a RF & Microwave Isolator with Frequency 1.5 to 2.6 GHz, Insertion Loss 0.5 dB, Isolation 20 dB, Operating Temperature -54 to 85 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for IS-37/NF can be seen below.