Features:* Made of high quality material, and reliable* Suitable for bar chairs, office swivel chairs, vehicle seats, display stands and more.* Strong load-bearing capacity, demanding to deform or squeeze* Can rotate 360 levels freely and smoothly*Uses a quarter-inch ball to avoid noise.* There are three diameters for your : three inches, 4 inches, 6 inchesSpecification:* Material: galvanized sheet* Colour: Black* Optional diameter: 3 inches, four inches, 6 inches* Size: 3 inches 71*71mm, 4 inches 94*94mm, 6 inches 155*155mm* Quantity: 1PCSPackage content:1 x hole turntableNote:1. The real colour of the thing may be barely various from the pictures shown on web page attributable to many points corresponding to brightness of your display screen and light-weight brightness.2. Please enable slight guide dimension deviation for the data.