These pupillary distance rulers are for achieving accurate measurements needed for eyeglass fitting. They are designed to be user-friendly, with clear and precise markings that make measurement . The lightweight and portable design that they can be used in various settings, providing convenience and reliability for both professionals and individuals. Features -Color:White -Material:Plastic -Size:17.60X2.20X0.05cm/6.92X0.86X0.02in - measurement kit: the pd ruler set includes everything you need for accurate pupillary distance measurements, making it a musthave for optometrists and individuals alike -Simple and easy to use: these pd rulers are designed for ease of use, allowing for precise measurements with minimal effort -plastic and durable: constructed from durable materials, these pd rulers are built to withstand regular use, ensuring longterm reliability -Quick and precise: the efficient design of these pupillary distance rulers fast and accurate measurements, enhancing the overall user experience -Ideal for various uses: suitable for use in optical shops and , these pd rulers are for ensuring the correct fit of eyeglasses Package list: 3 x Interpupillary distance ruler