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Concrete building elements; Non-metallic building facade elements; Flashing, not of metal, for building; Structural elements of glass; Roof flashing, not of metal; Double glazing units (Non-metallic -); Metallic cement; Building components of wood; Structural support members (Non-metallic -); Preformed concrete building elements; Modular building units (Non-metallic -); Stair components (Non-metallic -); Prefabricated building components (Non-metallic -); Manufactured building elements (Non-metallic -); Preformed building sections (Non-metallic -); Building components of imitation wood; Framework, not of metal, for building; Construction elements of plastic; Glass elements for building panels; Glazing elements made from glass; Slabs, not of metal, for building; Facade construction components of non-metallic materials; Double glazed hermetically sealed units (Non-metallic -); Constructional components of reinforced cement mortar; Building and construction materials and elements, not of metal; Structural elements (Non-metallic -) for use in building; Prefabricated building elements (Non-metallic -) for on site assembly; Expanded honeycombs (Non-metallic -); Spacers being building elements made of fibre reinforced cement; Memorials of granite; Wall stone; Coping stones; Worked natural stone; Natural stone tiles; Fire surrounds [mantles and mantlepieces] of stone; Blocks made from natural stone; Natural stone slabs and tiles