Check the listing for details. 3M 8922 Fast Shipping 10 Pack free shipping. Condition: New. Listed at 19.95 USD. 3M™ Dust Mask 8922 Dust Level 1 Hook and Seal - 10 Pcs Hook and seal provide comfortable fit and convenience, triple structure by ultra-static filter, 3M™ CoolFlow™ exhaust valve First-class dust mask 3M™ CoolFlow™ valves help maintain wearer comfort. Comfortable face seal and convenient hook application Cup-style design designed to fit Korean face types Class 1 dust maskThe 3M™ CoolFlow™ valve helps to keep the wearer comfortable.Comfortable face seal and convenient hook applicationA cup-style design designed to fit all facespurposeClass 2 dust mask included work placeMetal processing such as welding, casting, forging, casting, smelting, steel making, grind sanding, cleaning, transfer work, etc.Particulate matter, such as mineral, coal, iron ore, flour, metal, wood, pollen, etc.