PRODUCTS DISPLAY-->PRODUCTS DESCRIPTION-->Features:* Made of fantastic material, and reliable* Suitable for bar chairs, office swivel chairs, vehicle seats, reveal stands and more.* Strong load-bearing capacity, not easy to deform or squeeze* Can rotate for 360 levels freely and smoothly*Uses a quarter-inch ball to avoid noise.* There are 3 diameters to your : 3 inches, 4 inches, 6 inchesSpecification:* Material: galvanized sheet* Colour: Black* Optional diameter: three inches, 4 inches, 6 inches* Size: three inches 71*71mm, 4 inches 94*94mm, 6 inches 155*155mm* Quantity: 1PCSPackage content:1 x hole turntableNote:1. The genuine colour of the thing could also be barely varied from the pictures shown on website attributable to many points similar to brightness of your computer screen and lightweight brightness.2. Please allow slight manual measurement deviation for the data.DETAIL DISPLAY-->SHIPPING-->