SING CORE

Door panels, not of metal; Construction materials, namely, composite panels comprising primarily of a reinforced cement core that is mechanically bonded to steel sheets on both outer surfaces for use in barriers and doors; Non-metal door panels; Nonmetal door parts for buildings, namely, adjusters for adjusting the height of a door, floor boards, columns, beams, paneling boards, sills, sleepers, backings for ceilings or walls, stiles, rails and ceiling boards