7"± Exposed above base (50mm) is used when replacing Kitchen or office bases (Kits) to obtain correct height.
The inside diameter hole fit's new and older stationary or tilter mechanism having 1" spindles.
*We cannot predict precise measurement from floor to top of column or to underside of seat due to different base size heights, caster size and type of mechanism or seat plate used. We can say for normal chairs, #61E will be within a normal desk or table 30" seating height range.
Up to date Modern design.