Multiple Sizes OptionalOur heavy duty aluminum alloy rotary bearing with multiple sizes to choose from: 4", 6", 8" (optional). It is thickened and greatly improves load bearing capacity. High Quality Material: Th Lazy Susans is made of sturdy aluminum alloy, strong and durable, corrosion and rust resistant. You can choose the top material like wood, glass, marble to match your interior style. Non-slip rubber feet: Equipped with non-slip rubber feet which are non-slip and convenient to use. These bearings can be screwed or fixed as they have through holes and pre-drilled holes. Easy to install, no installation required. Caution: Ball bearings use rolling elements to maintain separation between moving parts to reduce rotational friction and support radial and axial loads, and sealed bearings are lubricated with oil, so you should with periodic reapplication of lubrication, based on usage. Wide Uses: Can be used for tables, corner cabinets, storage solutions, serving tables, magazine racks, television and computer screen turntables, floral arrangements, cake decorating and living room display cases.