All stairs are designed to your specifications and completely assembled at the factory with a custom-formed handrail, then “knocked down” (KD) for easy re-assembly at the job site. Stair models are available with a variety of handrail materials, but never plastic tubing. All stair models are customizable by selecting alternate stair balusters, panels, or handrails. Please inquire. Backed by a solid warranty, each custom spiral stair is an example of expert engineering and meticulous metal craftsmanship. Made in the U.S.A.