A floor mounted table base fits most table top sizes between 24" and 36" for larger tables, you may need more than one base. Richardson Seating's mounted table bases are made of commercial quality cast iron bell, steel threaded rods and a 7" top plate. The suggested table base height for 30" dining table tops is 28.5". We can make your base in chrome, black, or brass. We can also accommodate any table height. We have our most popular sizes for sale. All bases will need to be installed permanently into your floor. Please message us if you have any questions.