Mylen Stairs Condor 60-in x 13.34-ft 2 Platform Rails Black Spiral Staircase Kit, Fits Height: 102-in to 114-in (11 Treads) in the Staircase Kits department at Lowes.com
How to Build a Spiral Staircase
Arke Civik 55 in. Black Spiral Staircase Kit K03018 - The Home Depot