Welding Lens Compatible with Brand Miller Electric Compatible with Series Universal Fit Features 2 Arc Sensors Auto-On Or Auto-Off Circuitry Solar Powered For Use With Helmet That Accepts 2 in X 4 in Lenses Lens Color Gray Magnification No Plate Length 4 in Plate Thickness 0.056 in Plate Width 1/4 in Standards ANSI 87 CSA Z94.3 Welding Shade Designation W8