OPTK5910 Features: -Price Is For One Set -Minimum Order Of 1.-(SET OF 2).-UNSPC CODE: 46181700.-Lens Size : 4 1/2" X 5 1/4".-Welding Lens - Passive Welding Lens Auto Darkening darkening automatic lenses solar powered.-OPTREL OSE FRONT COVER LENS. Warranty: -OPTREL Welding Helmets Respond ten times faster than industry standards require. All helmets are dust and water resistant. These helmets offer outside adjustability and telescoping headgear. OPTREL has a 2 year limited warranty and is available in the following; Mira Plus black or red, Twisty black or red, OSC black, blue, green, silver and pink. Various Selectable fixed, selectable, and adjustable shades. Leather protectors, hardhat adapters also available..