SURFACE MATERIALS: The laptop desk is made of heavy-duty MDF wood panels with a moisture-resistant PVC laminate veneer in a graphite finish, which increases its durability and looking DURABLE FRAME: The laptop table has a durable powder-coated steel frame design that increases its stability for intense working. The desktop has a 90 lb weight capacity NON MARKING CASTERS: The rolling cart has easy-rolling double-wheel nylon casters that are nonmarking and can provide agility and freedom to move comfortably, and 2 of 4 casters has a locking mechanism SPACE SAVING: The laptop cart has interchangeable shelves that add a comfortable workspace. With exchanging those shelves to give you an extra desk space, this is perfect for small office areas STORAGE: This laptop storage cart is perfect for home offices and small offices. It features a single drawer and two shelves for storage