Rintal Phola Extra Step Kit for Beech Tread Spiral Staircase

Adds one solid beech step with vertical metal tube balusters (no handrail) to a Rintal Phola spiral staircase kit, for floor-to-floor heights above the 13-step range. Up to three extra steps take the stair to 16 steps and 12' 7⅛"; a center post extension is required above 10' 5⅝". Sold separately from the stair kit; order in the same diameter, frame and tread.