Multifunctional Eyeglass Spacer Pupil Distance Measuring Tool Distance/Angle Measuring CounterOOTDTYfeatures: lightweight for easy and portable carrying. Not only is it used to measure pupillary spacing, but also length and angle. Made of high quality material, durable and sturdy, long service time. Clear and accurate calibration make it easy to use and check the size. Ideal for hospital, pharmaceutical or medi inch materials. Specification: Material: Plastic Size: About 210x8 0mm/8.3x3.1 inchPackage Included: 1x PDU RulerNote: Please allow 1-3cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.