19 Non-metal doors and non-metal door systems, comprised of door panels, components, metal hinges and tracks, and accessories therefor, sold as a unit
7 Pneumatic, magnetic and motorized door operators and systems, comprised of parts, accessories, components, electronic controls, and control accessories therefor, sold as a unit
37 Service, maintenance, and installation of doors, door panels, door operators and door systems, including parts, accessories, components, controls, and control accessories therefor