Basic spiral staircase kit for external use with adjustable rise.
Basic kit rise range is 107-1/2" - 117-5/8".
Railings and modular steel supports with hot-dip galvanizing treatment. Nuts and bolts in stainless steel. Steps are studded sheet metal in hot-dip galvanized steel.
Handrail is made of Moplen - a type of polypropolene.