The package includes: A total of 20 storage box wheels. Castor Material: The wheel is plastic. The maximum load is 10 kg (Four wheels are used at the same time), please use within the load range. Castor size: Length is 47mm, width is 22mm, height is 17mm. Easy to use: It is recommended to clean the bottom of the box and keep it dry, then you can stick it directly on the box without puncturing or damaging your box. In order to stick it more firmly, it is recommended to use it after one day of sticking. Wide range of applications: Fits most small boxes such as storage boxes and trash cans. Sticking the rollers to the bottom of the box can help you move them more easily. 20 Pieces Self Adhesive Casters Casters for Furniture Self Adhesive Casters Storage Box Pulley Caster Mini Casters for Furniture and Storage Container Product specifications Material: plastic Color: dark gray Size: 47*22*17mm Function: It fits most small boxes such as storage boxes and trash cans, making it easy to move. Scope of delivery: 20* storage box wheels Note: 1. If you have any questions about the product received, please contact us to resolve the problem. 2. Product size is manually measured, there may be errors, please allow small size errors, subject to the actual product received. 3. The product color in the image may be slightly different from the actual color, please refer to the actual product.