This heavy duty printer stand supports 88 lbs for each layer. the powder-coated steel tube frame size is 1’’x1’’, and there is an extra load bearing tube under the top shelve , The solid construction,high quality particle board and industrial grade wheels make it quite a durable printer shelf that you can count on for years.The 3-tier printer stand with storage adopts universal wheel design, which is light to push and pull, we use industrial grade firm casters ,each of them is lockable to provide high stability when need to keep the print cart in position. Besides,you will also get 4 foot pads as spare parts. Adjustable Middle Shelf: The printer stand features a height-adjustable middle shelf with 3 reserved holes, allowing you to customize the space to accommodate various printer sizes, maximizing storage efficiency.