US Full Face Gas Mask Painting Spraying Respirator w/Filters for 6800 Facepiece. Used in Special Cases: the Filter Box Is Generally Replaced Within 200 Hours. The Filter Box and Filter Cotton Can Not Be Washed, Other Parts of the Mask Can Be Cleaned. Do Not Use in the Following Cases. Concentrations of Harmful Substances Too High. Filter Type: Organic Vapor/Gas and Dust Particles. Facepiece Type: Full Face (Reusable). Primary Material: Thermoplastic Elastomer (Tpe). Size: One Size Fits All. When to Change the Filter Cotton? When You Feel That the Breathing Resistance Is Obviously Too Large, the Human Body Feels Uncomfortable. Or the Filter Dust Is Dirty or Damaged, the Filter Cotton Needs to Be Replaced. The Filter Cotton Is Usually Replaced in About 8 Hours You Can Extend or Shorten the Service Life According. Metal Cutting & Welding. Suitable for Production in Cement Factories, Ceramics Factories, Shipyards, Soldering, Railway, Metal Smelting, Interior Renovation, Stone Processing, Graffiti Painting, Wall Art, Powder Processing, Etc. 1 X Respirator Full Face Cover. 2 X Replaceable Filter Boxes. 2 X Plastic Covers. 10 X Filters Cotton.