Durable material: You will receive 8 pieces self-adhesive casters, measuring 4.7x2.2x1.7cm, enough for your daily use. Made of solid ABS, strong, stable, reliable and durable. Little worry about breaking, shattering, deformation, friction and flexion. Longer life expectancy. Strong adhesion: Each piece comes with self-adhesive adhesive tape, super adhesive so that it can be firmly stuck on the surface of large containers. Not easy to fall off and ensure the safety of your stuff. No need to drill or screw before use, save time and effort.Practical for the surface of plastic, metal, cardboard, plywood and other materials. Wide application: Suitable for storage boxes, trash cans, furniture, ottomans and other large containers that need to be moved, also suitable for various DIY scenes, children's toys, crafts, etc. especially useful for transporting goods, a moving house and many important items. Usage: 1) Wipe the relevant surface and dry it completely.2) Remove the release paper, without touching the adhesive surface.3) Stand on the surface, make the load evenly distributed.4) Press the adhesive surface firmly to make sure it is in place.5)Wait about 1 day before car.Note: Wet and dusty surfaces are not good for adhesion. Note: The data are all manually measured, please allow 1-3cm error due to differences in light and display, There may be color differences, please refer to the actual item received.