The HPISI- A-Grade from HJ Optronics, Inc. is a Fiber Optic Isolator with Insertion Loss 0.5 to 0.7 dB, Isolation 29 dB, Operating Temperature -5 to 70 Degree C, Optical Power 5 or 10 W, Polarization Dependent Loss 0.15 dB. More details for HPISI- A-Grade can be seen below.