The Timber Balustrade Kit comes flat packed complete with 4 uprights, 2 horizontals (for 3 sides), 2 metal stabilizers and fixings. Its construction forms a 3 sided balustrade standing 950mm tall and ready to suit an 1200mm x 700mm opening. If your loft opening is smaller then it will be required that you cut the horizontals to suit. The Balustrade Kit can still be used for larger loft openings (e.g. 1400mm x 700mm) it will just mean that you will have a 200mm gap.