Solar Auto Darkening Welding Helmet-Solid Light Grey Universal Auto-Darkening Welding Helmet-Solid Light Grey Viewing Area: 3.86" x 1.69" Cartridge Size: 4.33" x 3.54" x 0.35" UV/IR Protection: Permanent Shade DIN16 Light State: Shade DIN3(S777), DIN4(S7770a); Darkened State: Shade DIN 9 to 13 Variable