These stones are core drilled with 1 1/4" hole through the column and the end recessed with a larger hole to house optional light ring. These polished units make exceptional show pieces for high-end residential or commercial settings. All columns are available individually. Shorter versions are available in complete kits with column, basin, pump, plumbing and lighting. For larger stones a reservoir kit with liner, ResCubes, pump, splitter and plumbing is available.