Weldcote offers true-color, auto-darkening filters that feature clear, high-definition technology that enhances the visible spectrum for optimal clarity and reduced eye fatigue. The filter, also referred to as a retrofit lens, provides users with vision accuracy, light diffusion and consistent shade. They fit all passive-style helmets that feature a standard 2 by 4 passive filter lens, and some auto-darkening helmets, depending on style. With a view area of 3.62-in. by 1.42-in. and a thickness of 0.2 in., the filters are available in 9, 10, 11 or 12 shade number.