The Bohler Guardian 50M Air Fed Welding Helmet is the perfect choice for welders who demand the best in respiratory protection and comfort. This helmet features a Powered Air Purifying Respirator (PAPR) system that supplies the welder with filtered, clean air, protecting them from harmful welding fumes and other airborne contaminants. The Guardian 50M also features a large viewing area with true color technology, providing the welder with excellent visibility. Additionally, the helmet is lightweight and comfortable to wear, even for extended periods of time. Benefits: Protect yourself from harmful welding fumes and other airborne contaminants See your work clearly and accurately, thanks to the true color technology Work comfortably and efficiently, even for long periods of time Be assured that your helmet is always performing at its best, thanks to the visual and audible warnings Features Welding helmet (matt) ADF: Shade 4, 9-13 External shade adjustment knob Grind mode button 50 x