Our CS-100 and CS-200 models are the premium spiral stair kits in our industry. Built with unique carrier reinforcing plates underneath the stair tread, Mylen offers the only true cantilever spiral stair design. Each stair in our custom series features a unique handrail cup-capture feature that eliminates the need for exposed hardware. Each baluster is attached securely to the stair tread by fixtures that are welded to the stair tread. These features, along with a heavier metal gauge design, make the custom series the best made spiral stair in the industry, period. As with all Mylen products, we can offer customizable features including a variety of wood tread and handrail designs, powder coat finishes, and options for outdoor use. Offered in diameters up to eight feet , our adjustable spiral stair kit can be shipped in configurations that meet building codes. Please contact us today, 1-800-431-2155 or email us, and ask to speak to one of our stair designers to discuss your application.