HELYZQ Optical PH Ruler - Pupil Height Meter for Optometry & Eye Exams | Professional Ophthalmic Tool for Accurate PH Testing | Perfect for Eye Clinics, Optometrists & Vision Care Specialists

Product Description

100% Brand new and high quality Plastic PH meter/PH Ruler Measure pupil height It is a very good promotional item and perfect for hospital, pharmaceutical or medical supplies Measurement Range: 0-40mm Size: Approx. 82x33mm How to use: (very easy) 1: Remove the lens 2: The bottom end of the Pupil height ruler is clamped into the frame. 3. The bottom of the frame reads the value from bottom to top. Package included: Includes:2 x PH Ruler