Introducing Instapark's newest accessories for the Instapark® ADF GX-990 Welding Helmet. Replace your old GX-990 welding helmet's cover lens with our new clear cover replacements. Debris and splatter can damage and wear down your cover lens, which can affect your visibility while welding. Be safe and replace your cover for crystal clear visibility. Comes in a generous pack of 2 front lens and 1 inside lens. Please advise that our replacement cover lenses are manufactured and are ONLY compatible with the Instapark GX-990 model, other brands and models WILL NOT be compatible with our replacement lenses.