Heavy duty 4 ft x 4 ft quick assembly tray stand. Absolutely no tools required. Can be assembled in 5 minutes or less. Accommodates all popular brand trays and reservoirs. Overall height is 25 in. Height from bottom bar to floor is 18 in without casters. Outside dimensions: 53 in length by 53 in wide. Inside dimensions: 51 in length by 51 in wide. US Patent 8,714,498, Patent Pending 14/269,619, PCT Application CT/US12/00001 and Chinese Patent 201280018267.2. Tray sold separately.