(Pack,PP,3.1/4,Glass,/category/inorganic-chemistry/solid-state-materials/chalcogenides-intercalation-compounds-and-metal-rich-phases/,FREE,10),+,Shade,Business Industrial, CNC, Metalworking Manufacturin, Welding Soldering Equipment, Welding Equipment Accessories, Welding Protective Gear, Welding Helmet Goggle Lenses,Welding,12,$6,x,4.1/4,- Welding Glass Shade 12 - 4.1 4 Pack + 2021 model 10 FREE 3.1 PP x Welding Glass Shade 12 - 4.1 4 Pack + 2021 model 10 FREE 3.1 PP x $6 Welding Glass Shade 12 - 4.1/4 x 3.1/4 (Pack 10) + FREE PP Business Industrial CNC, Metalworking Manufacturin Welding Soldering Equipment Welding Equipment Accessories Welding Protective Gear Welding Helmet Goggle Lenses (Pack,PP,3.1/4,Glass,/category/inorganic-chemistry/solid-state-materials/chalcogenides-intercalation-compounds-and-metal-rich-phases/,FREE,10),+,Shade,Business Industrial, CNC, Metalworking Manufacturin, Welding Soldering Equipment, Welding Equipment Accessories, Welding Protective Gear, Welding Helmet Goggle Lenses,Welding,12,$6,x,4.1/4,- $6 Welding Glass Shade 12 - 4.1/4 x 3. Check price on Amazon 3 Auto Darkening Welding Goggles, View Area 4.72x1.37 Inch. Must be used with clear polycarbonate safety / cover plate. Fits all welding helmets using a 4 1/2' X 5 1/4' lens. Welding helmets come in a variety of shades according to. Best Welds® Passive Welding Lens - 4 X 5 Glass Shade 12 Package of 1 - Best Welds® 4 1/2' X 5 1/4' passive shade 12 glass welding lens. Therefore, it will allow fewer radiations to pass through the filter lens and reach one’s eyes. It means that the helmet with a higher shade number will be darker. Table 2-3 Recommended lens shade by amperage and welding. Check price on Amazon 2 2 EACH Shade 12 Glass GOLD 2' x 4.25' Welding Hood Lens Helmet. Usually, welding helmets have their characteristic shade number, which represents the allowable intensity of the radiation. Figure 2-12 After welding, metal should be protected with paint or some other type of coating.