The GPC-ISO-1300nm dual stage from Laser 2000 is a Fiber Optic Isolator with Insertion Loss 0.5 to 0.7 dB, Isolation 45 dB, Operating Temperature 0 to 70 Degree C, Optical Power 500 mW3, Polarization Dependent Loss 0.1 dB. More details for GPC-ISO-1300nm dual stage can be seen below.