Auto Darkening Filter, Compatible with Brand Optrel(R), Compatible with Grainger Part Number 44YT86, 44YU03, Compatible with Manufacturer Model Number e684, Compatible with Series e684 Helmet, Sphere Series, Features Fadetronic, Gring Mode, Opening Delay, Overhead Wedling, HD Viewing Area, Replacement Auto Darkening Lens for e684 Helmet, Sensitivity Control, Shadetronic, For Use With 1006.500, 1006.501, 1006.502, Optrel E684 Helmet, Lens Color Green, Magnification No, Plate Length 4 1/4 in