Heavy duty 4 ft. x 8 ft. quick assembly tray stand. Absolutely no tools required. Can be assembled in 5 minutes or less. Accommodates all popular brand (ID) trays and reservoirs including Flo-n-Gro, Duralastics, Botanicare and more. Overall height is 25 in. Height from bottom bar to floor is 18 in without casters. Outside dimensions: 102 in length by 53 in wide. Inside dimensions: 100 in length by 51 in wide. Tray sold separately and may fit differently depending on brand.