Filter: two filter stages. The outside is made of a coarser stuff-like material, the inside is similar to a Hepa filter but has no markings. Construction: Primarily plastic, but most stress points are steel. The hose is self-supporting and articulated. The tip is made of soft rubber. Usage: The tubing extends from the base of the filter, allowing the filter itself to be placed over or beside the workpiece. The hose assembly (end cap, hose and pan) simply snaps onto the bottom of the unit. Noise: It's a bit louder than my CNC machine's fans, so it's not quiet, but I don't have to shout to speak. This works very well and I can use my little laser CNC without worrying about smoke etc.