3M Coverall 4540 Alb 4XL

Variable dark shade 8-12 (100V). Possible to lock-in the light state, e.g when grinding. Delay function to set the dark-to-light opening time. Three sensitivity levels. Compatible with most 3M™ Disposable Welding Particulate Respirators Magnification made easy. The magnifying lens holder is built into the welding filter, making lens installation easier and more secure.