This is a pair of advanced Surgitel 6.5X prismatic loupes mounted on the Oakley Radar EV black frame. Interpupillary is 63mm. They have a working distance of 16 -19 inches depending which is selected by the buyer. They have the maximum Declination Angle of 45 degrees. Never used. Perfect condition no scratches or damage. Includes protective carry case. Measure your Interpupillary Distance on your IPhone see pictures in description EyeQue app. Ready to use.