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55 Pack 2 x4.25 inches Clear Welding Lenses, 0.04" Thick Replacement 2x4 Welding Lens, Welding Hood Clear Lenses for Most Standard Size Helmets cocoon GREAT VALUE OF 2 PACK255 Pack 2 x4. 25 inches Clear Welding Lenses, 0. 04" Thick Replacement 2x4 Welding Lens, Welding Hood Clear Lenses for Most Standard Size Helmets Product Features Crystal Clear Polycarbonate MaterialMade from 100% impact resistant polycarbonate, Compared with the ordinary material welding lens on the market, ours is thickened to 1mm, these lenses offer high optical clarity and withstand high temperatures and spatter without warping or cracking,