Solid welded construction combines with extra reinforcements to make the WILRAY Double-Wall Safety Cabinet of the most durable cabinets available. Welded top and bottom seams add extra rigidity and structural integrity. Full-welded, 18-ga. cabinet is double-walled with a 1-1/2" air space. Leakproof construction includes a solid welded 2" sill and sump to contain hazardous materials. Self-closing doors feature a rugged hinge with an internal spring and a 3-point self-latching closure. Also includes exhaust vent, 12-ga. 4" high legs, and adjustable galvanized shelves. Made in USA.NOTE: Models 46385, 46386, and 43687 have shelves that are not adjustable.