Dimensions: Turntable Bearing: 12cm (Note: The recommended outer diameter of the turntable cover is about twice the surface area of the turntable bearing). Aluminum Alloy Material: The turntable base is made of aluminum alloy with a brushed surface, which is sturdy and durable, rust-proof, has strong load-bearing capacity and a long service life. Smooth Rotation: The workbench adopts a ball bearing design, which improves rotation efficiency, reduces friction and resistance during rotation, and makes rotation lighter and easier. Wide Applications: The turntable is used for dining tables, hand carving tables, cake decorating tables, plant pruning stands, rotating furniture, TV/monitor rotation, repair tables, display stands and DIY tools, etc. Easy Installation: The table swivel base is easy and Convenient to install. Simply position the bearings in the desired locations and place the turntable cover. You can also screw the bearing onto the turntable cover and place it in the desired position.