3M 9926 Valved Dust/Mist/Nuisance Level Acid Gas Respirator Speciality Respirators can be used for a wide variety of applications ranging from welding to waste sorting. The speciality range provides lightweight, effective, comfortable and hygienic respiratory protection against dust and mist. It also provides additional relief from low to moderate levels of organic vapours or acid gases such as sulphur dioxide and hydrogen fluoride (depending on the product type.) - Box Quantity 10