Features: Adopting heavy duty aluminium alloy material, solid, durable crosion resistant. Smooth surface beautiful, easy to clean. Easy to set up, no installation is required. These bearings can be screwed fixed as they have through holes pre-drilled holes. f Ideal f cake decations, TV monit st, electronic repair, sculpture base, catering services, food display, serving. Package Includes: 1 x Table Bearing Specifications: Material: Aluminum Alloy 12 Inner Diameter: Approx. 24.5cm or 9.65inch 12 Outer Diameter: Approx. 30cm or 11.81inch 5 Inner Diameter: Approx. 8.5cm or 3.35inch 5 Outer Diameter: Approx. 14cm or 5.51inch 8 Inner Diameter: Approx. 14.5cm or 5.7inch 8 Outer Diameter: Approx. 20cm or 7.87inch 10 Inner Diameter: Approx. 19.5cm or 7.68inch 10 Outer Diameter: Approx. 25cm or 9.84inch Thickness: Approx.8.5mm note: 1.Please allow 1-2cm errs due to manual measurement, make sure that you do not mind befe you der. 2.Due to the difference between different monits, the picture may not reflect the actual col of the item. When shopping, please pay attention to the size dimensions of the product to ensure that it meets your needs. In the title , we have provided detailed infmation about the product, including its features specifications We want you to be completely satisfied with your purchase, so if you have any questions concerns, please don't hesitate to contact us. We are here to help will do our best to assist you. Thank you f choosing our product. We hope you enjoy it!