The GPC-ISO-1064 nm Single Stage from Laser 2000 is a Fiber Optic Isolator with Insertion Loss 1.5 dB to 2.0 dB, Isolation 30 dB (SM) - 35 dB (PM), Operating Temperature -5 to 50 Degree C, Optical Power 300 mW, Polarization Dependent Loss 0.15 dB. More details for GPC-ISO-1064 nm Single Stage can be seen below.