3M Speedglas Welding Helmet G5-02 with curved glass Auto-Darkening Lens. Thanks to the improved optics, the 3M Speedglas Curved Welding Lens G5-02 allows you to more readily recognize colors, using the 3M Speedglas Natural Color Technology.3M Speedglas Welding Helmet G5-02 with curved glass Auto-Darkening Lens. Thanks to the improved optics, the 3M Speedglas Curved Welding Lens G5-02 allows you to more readily recognize colors, using the 3M Speedglas Natural Color Technology. Features our largest Auto-Darkening Lens field of view ever (150x76 mm), utilizing the 3M Speedglas Curved Glass Technology. Light state 2.5 with variable dark shades 8-12. By selecting just the right settings for each task, you help reduce eye strain and can improve the quality of every weld. Arc detection sensitvity can be adjusted for unsurpassed swithching reliability. Offers highly sensitive arc detection ideal for TIG welding operations. Adjustable delay function to set dark-to-light opening time.