all you have to do is add the shelf packages you want to this base. Every shelf is 24" x 22" - you specify what distance you want between shelves: 7", 10" or 14". Shelves can be arranged in any order to provide modular spacing. Made in the USA from 100% solid steel, which is then painted with an incredibly durable powder coat finish. Add optional casters for ease of mobility (casters add 4" to height of stand).