"Product Description Material: Galvanized Iron Color: Silver Ball Material: Nylon Ball Diameter: 16 mm (0.5 inch), 25 mm (1 inch) Dimensions 16 mm: 48 x 32 x 20mm (L*W*H) Dimensions 25mm: 75 x 50 x 30 mm (L*W*H) Package includes: 4 x roller transfer 8 screws 1. 【CONTENTS OF DELIVERY】: 4 x nylon furniture casters, 8 x screws, 16/25mm diameter round ball transfer, the space to install the transfer bearing roller is small. There are two mounting holes for screw mounting. 2. 【HIGH QUALITY MATERIALS】: The main body of the furniture ball transfer unit is made of galvanized carbon steel, which has the properties of scratch resistance, corrosion resistance, rust resistance, and is not easy to be damaged. 3. 【COMFORTABLE AND CONVENIENT】: smart and hassle-free; The ball can rotate 360 ​​degrees flexibly, use it smoothly, move the goods faster and save more time. The maximum load capacity of a single caster is 15 kg, which is applied to most objects. 4. 【NO NOISE】: The ball bearing transfer units are polished during the production process, a smooth surface and no significant noise is generated during transportation. This whole ball transfer rolls smoothly and quietly thanks to the ball bearing drive. 5. 【WIDE APPLICATION】: Ball bearings mainly help people to move goods, not only at home such as sofas, showcases, carts, shelves, scooters, cabinets and kitchen appliances, but also in industries such as transmission systems, power systems, processing systems, packaging machinery and auxiliary machinery."Note: The data is all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.