Universal Wheels For Furniture Various Storage Boxes. FEATURES: Wear Resistance: The Ball Caster is Made of High-quality Durable and Featured by Great Weight-bearing Capacity. Easy to Install: The Ball Caster Features Adhesive Design, the Caster Can Be Installed on the Bottom Box Without Complicated Process. Quiet and Practical: The Rotation of High-quality Casters and the Precision Ball Bearings in the Shaft Make Rolling Easier. The Internal Bearing of the Wheelchair Foot Rolls Quickly, the Surface is Smooth, Will Not Be Blocked by Crumbs, Hair and Sand, You Will Enjoy Smooth and Quiet Movement. Shock Absorption: No Noise, No Scratches. The Ball Casters Have High Shock Absorption Performance. These Ball Casters Allow the Box to Roll Smoothly and Quietly Without Making a Harsh Sound, and Ensure That the Box Will Not Scratch or Leave Marks on Any Surface. Wide Applications: The Ball Casters Are Suitable for Different Types of Storage Boxes and Make Them Easy to Move. SPECIFICATIONS: Material: Metal + Plastic Size:4.5cm  INCLUDES: 16 X Castors Wheels . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.