Profile: UK Stairparts specializes in supplying staircase components. We provide handrails, baserails, spindles, newel posts, newel caps, banisters, and balustrades. Stair spindles are produced in four standard thickness, 32mm˛, 35mm˛, 41mm˛ and 50mm˛. Every handrail and baserail carries a groove of matching size. Standard stair spindles are produced 900mm and 1100mm long. The longer of the two are mainly used for commercial properties or cut string staircases where the stair spindles are fitted directly to the treads.