19 Non-metal windows; non-metal doors; non-metal window and door screens; non-metal door systems for closets composed of doors, door frames, and fittings; non-metal garage doors; non-metal window shutters; non-metal door skins; non-metal door panels; non-metal mill work products, namely, moldings, door frames, window frames, window sash and frame parts, base moldings, jambs, sills, and panels for windows and doors; non-metal window installation materials, namely, sashes, pulleys, cord, weather stripping, and sash locks sold as a unit; and parts and fittings for all of the aforesaid goods; lumber and lumber by-products, namely, wood chips, wood particles, wood shavings, and sawdust; non-metallic building materials, namely, columns, capitals, bases, posts tops, spindles and stair parts, namely balusters, newels, handrails, tread and risers; components of doors, namely, plastic protective covering for glass panes; glass panels; glass panes; glass tiles; insulated glass; safety glass for building purposes; window glass; door glass; and window panes; flooring components, namely, panels made of wood fiber and coated with metal for use with hydronic tubing