-Visual Door Self-closing and self-latching, beveled door with casketing for excellent seal to get rid of leakage. -Door Louvers Cleaned and filtered air intake at the bottom of door. -Cylinder Bracket Kits Heavy-cast aluminum bracket with chrome steel safety chain or polypropylene strap. -Wire-reinforced safety Window Large and lockable opening, wire-reinforced safety glass for broad sight of inside manifold. -Steel Construction Neat enclosures are all-welded construction, scratch- and corrosion-resistant epoxy paint