This pupillary distance ruler is a simple and practical eyewear accessory that will provide you with greater precision in your eyewear. It is easy to operate without technical design and quickly measures distance to ensure more accurate optometrist. Its compact and lightweight design also allows you to use it anywhere, anytime. Features -Color:Assorted Color -Material:Plastic -Size:18.00X4.00X0.20cm/7.07X1.57X0.08in -Easy to operate and quick to use, ensuring precision measurement results. No extra hassle for you. -Use for a wide range of applications, including dispensing stores, opticians and medical institutions. -Suitable for a wide range of eyeglasses dispensing needs. Provide you with more reliable service and . -Small and convenient, portability, can be used in different occasions, such as outdoor, travel, etc. -Not only suitable for the measurement of glasses accessories, but also can be used for the measurement of pupil position or other measurements need to use a soft ruler. Package list: 2 x Pupillary Rulers