One of my recent purchases was for a air purifier gas style mask that people use when spray painting in industry. I haven’t got around to doing anything with this yet so what you see in the picture is the stock item. But it turns out to be a very practical purchase as well as something I hope to mod. Its very useful while cutting and sanding, polishing pieces of brass and other metals and manages to keep that very strong pennies smell out of my mouth after I have been working on a project.