The AP-ISO-1064PI from AdValue Photonics is a Fiber Optic Isolator with Insertion Loss 1.0 dB, Isolation 26 to 40 dB, Operating Temperature -5 to 50 Degree C, Optical Power 1000 to 20000 mW, Polarization Dependent Loss 0.15 dB. More details for AP-ISO-1064PI can be seen below.