3M™ Cupped Particulate Respirator 8246, P2, with Nuisance Level* Acid Gas Relief (Pack of 20)The 3M 8246 disposable acid gas respirator is designed to help provide quality and reliable respiratory protection to workers from nuisance levels* of acid gas, such as, sulphur dioxide and hydrogen fluoride. Protection factor: 10 x Workplace Exposure Standard Packaging: 20 respirators box, 6 boxes case *Nuisance levels are those levels below the Workplace Exposure Standard Proper selection, training and use are essential in order for the respirator