The LNF-ISC4_12B from Low Noise Factory is a RF & Microwave Isolator with Frequency 4 to 12 GHz, Average Power Forward 1 W, Insertion Loss 0.2 to 0.3 dB, Isolation 20 dB, Operating Temperature 0.01 to 100 K. Tags: Coaxial Isolator. More details for LNF-ISC4_12B can be seen below.