CVI  Partial reflector (Output Coupler) PL/PL Centered at 850nm 98.6%R , 1" dia. Though the box says "98%", 98.6% is written on the optic and the box, also that it is flat and not wedged as the designation "IF" stands for. PR/AR or Partially reflective side 1, Anti-reflection coated side 2. I combine ship.