EXAIR’s fine mesh non-woven Drum Cover is built to fit over the top of 55 or 30 gallon drums. e breathable material allows the air from a Line Vac air operated conveyor to circulate, whether moving material in or out of the drum. The cover prevents contamination of your material and keeps material from escaping the drum which keeps your work environment cleaner and safer. Since it is fabricated to fit 55 or 30 gallon drums, it is the simplest of solutions when needing a containment vessel for your transferred scrap, trim, waste, parts, chips or pellets. It is suitable for Line Vac conveyance hoses from ¾" through 3.4" outside diameters and comes complete with hose clamps and a durable spring buckle strap for quick and easy installation.