Features: Horizontal and vertical bridge adjustment Separate PD adjustment for each eye. Individual adjustments for temple length Adjustment for rotating cylinders. Scales with large numerals. The trial frame has the ability to accommodate up to four pair of lenses. This provides the ability to refract even the most difficult prescriptions. It is very lightweight and offers all the adjustments to ensure a proper and comfortable fit onto your patient. Descriptions: Easier to use and easier to wear The leg can be adjusted to the best length you want. Made of high quality material, it is durable for long time. Specifications: Material: metal Color: silver&black Inner aperture: 32.5mm Maximum distance between left and right lens feet: 200mm Length adjustment range of left or right lens foot: 98mm ~ 135mm Nasal accommodation range: length: 0 to 14mm; angle: 0 to 30 degrees The displacement of the geometric center of the lens frame position: 0.3mm The non-concentricity of the lens optical center and the frame geometry center: 0.5mm The lens optical axis and frame geometry axis nonparallelism: 2.5 The degree of rotation of the lens around the optical axis in the frame: 360 Package included: 1 x Optical Trial Lens Frame Notes: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please allow slight deviation due to manual measurement. Thank you