Dolle Barcelona Spiral Staircase - Black - 11 Tread Kit (55" Diameter) Small, compact black modular staircase with easy DIY installation and multiple layout options Adjustable height to fit most stairway heights/lenghts. Indoor use only. Can be installed in either a clockwise or counter-clockwise direction 14-day Return Policy. 20% Restocking Fee on all Staircase Returns. HOMEOWNER IS RESPONSIBLE TO VERIFY ANY LOCAL APPLICABLE BUILDING CODES PRIOR TO PURCHASE