High-quality Material: Made of plastic, strong and , strong carrying capacity, when using 4 wheels at same time, the maximum weight that can withstand is 8KG. Adhesive Design: Installed on bottom box, there is no complicated process. The wheels are small and will not affect overall appearance. It has no restrictions on adaptation. Beautiful and Convenient: Easily move or place heavy furniture, no need to spend energy to move furniture when cleaning, powerful bearing wheels make movement more labor-saving. Flexibly Change Direction: Caster rotation and precision on shaft make rolling easier. The inner bearing of wheelchair foot rolls quickly, the is smooth, you will enjoy smooth and quiet movement. Wide Application: The wheels are suitable for different types of storage boxes, making it easier to move. It can be fixed with sideboards, bedside cabinets, side cabinets, suitcases/trash bins, etc. colour: white Material: plastic size: 2x3cm Package Contents: 16 x Casters Only above package content, other products are not included. Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.