ZDNEY 5 Inch Polyurethane Caster Wheels Polyurethane on Polyolefin Core Wheel with Double Roller Bearing, Casters Set of 4 Heavy Duty with 4000 lbs Capacity, Use for Handling, Industrial Trolleys 0782150691122 [Wall or Door Mounted] You can Stylus Pens [Wall or Door Mounted] You can mount the jewelry organizer on the wall with the provided screws or hang this jewelry cabinet over the door using the brackets included—you’ll save your precious floor space either way Recommend Mattress Thickness: 6'' 8'' Four 5 inch wheel can support load 4000Lb The proprietary formulation in the tread serves as a protective layer between the load and the floor making pivoting and maneuvering easy