【Large Steel Ball for Greater Weight Capacity】Unlike common self adhesive mini caster wheels, our new adhesive wheels use a large 20mm(0.8inch) diameter steel ball in the ABS bracket for effortless and smooth rolling. In addition, each wheel carries 28 pounds. 4 wheels have a total load capacity of 112 pounds, and 8 wheels have a total load capacity of 224 pounds 【Low Profile Design for Furniture】The compact design of our caster rollers allows for easy installation on the bottom of your small furniture and appliances without affecting the aesthetics. These swivel casters are so versatile that you can mount them on the feet/legs of furniture or appliances such as coffee tables, cabinet, bookshelves, nightstands, planters, air purifiers and more. Tip: These casters can only be used on smooth and hard surfaces and may leave marks on wooden surfaces 【Quality Steel and Bearings for Smooth Swivel】Our upgraded casters are made of quality metal and thick ABS material, which is sturdy and durable. No more worrying about furniture being too heavy to move when mopping the floor. With it make your furniture and appliances easy to move and rotate 360° freely 【Customized Tapes for Stronger Adhesion】Each caster comes with customized adhesive tape (2 extra tapes are also included). The customized tape has stronger adhesion so that it won't easily separate from the bottom of the furniture. PLEASE NOTE: Waiting 24 hours after installation before using will get better results 【Quick Installation】The casters are super easy to install. You just need to stick the tape on the casters and furniture in turn. You can also refer to the diagrams in the product manual for installation. Warm Tips: To avoid scratching floors, do not use heavy furniture over 44 lbs. on casters or on white stone or tile floors