Features:* Made of nice material, and reliable* Suitable for bar chairs, office swivel chairs, car seats, display 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 avoid noise.* There are three diameters to your : 3 inches, 4 inches, 6 inchesSpecification:* Material: galvanized sheet* Colour: Black* Optional diameter: 3 inches, 4 inches, 6 inches* Size: 3 inches 71*71mm, four inches 94*94mm, 6 inches 155*155mm* Quantity: 1PCSPackage content:1 x hollow turntableNote:1. The real coloration of the object may be slightly different from the photographs proven on web content brought on by many points corresponding to brightness of your video display and lightweight brightness.2. Please allow slight handbook measurement deviation for the data.