Furniture Casters for Crib Used for Wood-Based Material Floor Tiles Floor Used for Coffee Tables Plant Stands Book ShelvesOOTDTsFeatures: The roller rivets are thickened and reinforced, so that the roller rotates at high speed, prevents slipping, muting and not easy friction. The roller is made of synthetic rubber, which is and easy to push and pull. More beautiful, waterproof and oil-proof, it is not affected by sunlight, rain and dust. Suitable for all kinds of furniture cabinets, cot wheels. The soft roller rubber wheel surface guarantees no marks on carpets or any kind of natural and wood-based material flooring, tile floor, special floor and smooth concrete/asphalt floor. Specification: Material: Rubber + Stainless Steel Type: 16mm Universal Wheel/16mm Universal Brake/18mm Universal Wheel/18mm Universal Brake/20mm Universal Wheel/20mm Universal Brake/22mm Universal Wheel/22mm Universal Brake/25mm Universal Wheel/25mm Universal BrakePackage Included: 1 x Furniture Crib WheelsNote: Please allow 0-1mm error due to manual measurement. Pls make sure you don't mind before bidding because of the difference between different monitors, the picture may not reflect the actual color of the thing. Thank you!