This Auto-Darkening Welding Helmet is designed with the serious user in mind and conforms with ANSI and CE standards. Adjustable Sensitivity Outside Helmet Welding or Grinding Selection UV/IR Protection Battery and Solar Power Dark to Clear Delay Adjustment Molded Nylon Construction Variable Shades 9-13 3.86 x 1.69 Viewing Area This nylon helmet features a moisture absorbing headband which adjusts up and down as well as front to back. The ratcheting headgear allows for many hours of comfortable use. Select welding or grinding state on inside of helmet and shade number on outside.