Features:* Made of nice material, and reliable* Suitable for bar chairs, workplace swivel chairs, automobile seats, show stands and more.* Strong load-bearing capacity, hard to deform or squeeze* Can rotate for 360 levels freely and smoothly*Uses a quarter-inch ball to circumvent noise.* There are three diameters in your : 3 inches, four inches, 6 inchesSpecification:* Material: galvanized sheet* Colour: Black* Optional diameter: three inches, four inches, 6 inches* Size: 3 inches 71*71mm, 4 inches 94*94mm, 6 inches 155*155mm* Quantity: 1PCSPackage content:1 x hollow turntableNote:1. The genuine colour of the item may be slightly various from the images shown on web content brought on by many factors similar to brightness of your display screen and lightweight brightness.2. Please enable slight guide size deviation for the data.