The Grainger 16T999 is a 3M Speedglas Welding Helmet 9100 with auto-darkening filter featuring a large viewing area and 3 arc sensors to detect the welding arc. It has adjustable sensitivity and delay controls, along with shade control from shade 5 to shade 13. The helmet provides protection from UV/IR rays and has a lightweight balanced design for comfort. The 9100 welding helmet uses solar cells to power the auto-darkening filter.