1. Ergonomic DesignThe tray features a curved shape that meets ergonomic standards and ensures a comfortable and visually appealing fit for the forehead. The adjustable chin rest provides excellent chin support for added comfort. 2. Height AdjustableEquipped with height adjustment buttons on the forehead and chin supports, this product an adjustable fit, with a minimum height of 260 mm and a maximum height of 355 mm from the base to the chin rest. 3. Product DimensionsThe lifting chin holder measures 570 mm x 220 mm and has a lifting capacity of 95 mm. The chin rest can be adjusted from 265 mm to 355 mm above the base, while the distance from the chin rest to the headrest can be changed between 105 mm and 200 mm. 4. : Made from durable materials, including plastic, aluminum alloy, and stainless steel, this product features an electroplated surface for rust resistance and longlasting performance.