4pcs Storage Box Pulley Casters Trash Can Self-Adhesive Unidirectional Furniture Caster Wheel Box SkateboardFeature:1. ABS roller frame, strong and durable.2. Simple installation, adhesive design, installation on the bottom box, no complex process.3. Caster rotation and precision ball bearings on the shaft make rolling easier. The inner bearing of the wheelchair foot rolls quickly and the surface is smooth. It won't be stuck by bread crumbs, hair and sand. You will enjoy smooth and quiet movement.4. It has unlimited durability and high shock absorption. These spare casters allow you to roll smoothly and quietly without harsh sounds and ensure that you do not scratch or leave marks on any surface.Specification:Material: ABS + acrylicSize: 44 * 15.5mm/1.73*0.61''Quantity: 4pcsColor: Black, WhiteLoad bearing capacity: 4pcs used together, bearing 16KGScope of use: the wheel is suitable for different types of storage boxes, and it is easier to moveNote:1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!2. Please allow 1-2cm measuring deviation due to manual measurement.4 X Storage Box Pulleys