The height of the interior shelf adjusts in four positions in 2" increments. The doors with self-closing hinges provide a 110-degree swing for full access to the storage compartment. Top with side guards, sides and doors are made with low-pressure laminate. Back, shelf and bottom are made of steel. Cabinet rolls easily on four 1-5/8" dual-wheel casters, two locking, and supports up to 150 lb.