The PE83IR1037 from Pasternack Enterprises Inc is a RF & Microwave Isolator with Frequency 26.5 to 40 GHz, Average Power Forward 10 W, Insertion Loss 1.7 dB, Isolation 12 dB, Operating Temperature -20 to 70 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for PE83IR1037 can be seen below.