For use with 5 or 10 lb portable fire extinguisher. All bubble door styles have a projecting convex polycarbonate panel enclosing the extinguisher. Regularly furnished: 20 ga. box, 20 ga. tubluar steel door with 18 ga. frame and a continuous steel hinge (brass pin). Recessed, semi-recessed and surface mounted cabinets are furnished with .125" (0.31 cm) radiused frame. All components are powder-coated with an electrostatically-applied, thermally-fused, recoatable white polyester finish. Door and frame available in aluminum, stainless steel, brass or bronze.