Adjustment knob display, you can adjust the mask position and tightness according to personal habits. Face screen and dimming lens frame are integrally formed, which has a long service life and is more convenient to operate. Aoto dimming in milliseconds, giving you more eye protection. Visor and face space is large enough, breathable, easier work. Anti-scalding, high temperature resistance, suitable for a variety of electric welding work content and occasions. Specifications: Material: ABS Dimension: Approx. 108 x 50mm /4.25 x 1.97inches Net Weight: Approx. 289g Note: Please allow 1cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: 1 x Welding Mask