TiStmTired of seeing scratches from your office chair on your favorite floor?Tired of the constant scratching sound when moving the work chair?Are you annoyed by the lack of flexibility as the chair wheels always stick to the carpet?Are you looking for a way to protect hardwood floors from harm?Try the roller skate style 4-inch casters! You only need to replace the old low-quality plastic casters. Soft and silent casters made of high-quality transparent polyurethane, roller-skating style, these efficient casters can safely support up to 650 pounds. They are very durable and suitable for all floors including wood and hardwood floors, laminate floors, vinyl floors and tile floors.Name: Office chair casterWheel material: PU polyurethaneWheel core material: PPWheel diameter: 100mm / 4 inchesSingle wheel load: 60kg / 132lb? Tip:1. Due to differences between different monitors, pictures may not reflect actual colors. We guarantee that the actual style is the same as in the photo.2. Due to manual measurement, please allow 1-2mm error.3. Welcome to our store! Our goal is to provide our customers with the best products and services. If you have any questions, please feel free to contact us. We will immediately resolve all issues related to this product and will be happy to assist you.