GILLIS Steel Horizontal Cabinets for Gas Cylinders prevent build-up of dangerous fumes. For use in a well-ventilated area. Protect 20-, 30-, or 43-lb. cylinders behind tamperproof doors. Choose unassembled or set-up cabinets. Unassembled Cabinets have hot-rolled angle frames with cabinet back panels that are reinforced against slamming of cylinders. 13-ga. expanded metal wall panels. 16-ga. sheet steel roof. Welded door hinges, tamperproof padlock hasp. Easy to set up. Set-Up Cabinets are stenciled to indicate flammable storage. Also include: 13-ga. expanded metal sides, solid metal top, and legs that are punched for bolting to floor. All double-welded construction, ready to use. Made in USA.NOTE: Maximum cylinder quantity is based on maximum 14" diameter cylinders.