The 994-037664-023 from M2 Global Technology is a RF & Microwave Isolator with Frequency 1.3 to 1.4 GHz, Average Power Reverse 10 W, Insertion Loss 0.5 dB, Isolation 20 dB, Operating Temperature 0 to 65 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for 994-037664-023 can be seen below.