Features: brand new and high quality Made from high-quality galvanized sheet, corrosion-resistant, rust-proof, wear resistant and durable. Ball bearing raceway for smooth rotation. Our swivel bearing has a deeper ball raceway to allow balls to move effectively and smoothly. All of our carousel turntable bearings use metal balls for efficient operation and maximum stability of the mechanism. Round shape, 4 different diameters(5.5"/8"/9" /12") of our swivel plates could be selected, having properties of sturdiness, durability and high stability. It is suitable for using with revolving shelves in corner cabinets, turntable kaleidoscopes, tabletop serving, for pop displays, magazine racks, movie poster displays, television and computer monitor turntables, flower arranging, cake decorating, revolving musical boxes etc. Specifications: Material: Iron Galvanized 12 Inner Diameter: Approx.16cm/6.3inch 12 Outer Diameter: Approx. 33cm/12.99inch 5 Inner Diameter: Approx. 6.4cm/2.52inch 5 Outer Diameter: Approx. 13.8cm/5.43inch 8 Inner Diameter: Approx.10.2cm/4.02inch 8 Outer Diameter: Approx. 20.5cm/8.07inch 9 Inner Diameter: Approx. 11.3cm/4.45inch 9 Outer Diameter: Approx. 22.8cm/8.98inch Package Includes: 1x Turntable Swivel Base note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.