Adjustable Optical Optic Trial Lens Frame Eye Test Glasses Optometry Optician Changeable Cylinder Axis for Glassses Shop_x005F_x000D_ Features: Degree of lens rotating around optical in the lens frame:360. Easier to use and easier to wear Easily changeable cylinder Offers all the adjustments to ensure a proper and comfortable fit onto your patient. Axial graduation increases along the lens frame counter clockwise. Suitable for eyesight examination in spectacles shops, department of ophthalmology in hospitals, schools and enterprises. Specifications: Material: Metal rotation: 360 degrees. Pupil distance Mirror ring diameter: 38mm Lens number: 8 lens Package Includes: 1x Optical Trial Frame Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.