Measure pupil distanceMeasurement Range: 0-100mmIt is a very good promotional item and perfect for hospital, pharmaceutical suppliesColour: whiteMaterial: plasticSize: Length: about 21cmPackage Contents:2 x PD RulerOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
