Features:* Made of fantastic material, and reliable* Suitable for bar chairs, office swivel chairs, vehicle seats, demonstrate stands and more.* Strong load-bearing capacity, tough 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, 4 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 hole turntableNote:1. The real coloration of the item could also be barely diversified from the photographs shown on website brought on by many factors equivalent to brightness of your computer screen and lightweight brightness.2. Please allow slight guide dimension deviation for the data.