Features:* Made of high quality material, and reliable* Suitable for bar chairs, office swivel chairs, car seats, demonstrate stands and more.* Strong load-bearing capacity, difficult to deform or squeeze* Can rotate for 360 degrees freely and smoothly*Uses a quarter-inch ball to circumvent noise.* There are three diameters in your : three inches, four inches, 6 inchesSpecification:* Material: galvanized sheet* Colour: Black* Optional diameter: 3 inches, four inches, 6 inches* Size: three inches 71*71mm, 4 inches 94*94mm, 6 inches 155*155mm* Quantity: 1PCSPackage content:1 x hollow turntableNote:1. The genuine coloration of the thing could also be slightly various from the pictures shown on online page caused by many factors akin to brightness of your display screen and lightweight brightness.2. Please allow slight guide size deviation for the data.