The PE83IR1038 from Pasternack Enterprises Inc is a RF & Microwave Isolator with Frequency 35 to 42.5 GHz, Average Power Forward 10 W, Insertion Loss 1.6 dB, Isolation 14 dB, Operating Temperature -20 to 70 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for PE83IR1038 can be seen below.