Features:* Made of superb material, and reliable* Suitable for bar chairs, office swivel chairs, car seats, reveal stands and more.* Strong load-bearing capacity, challenging to deform or squeeze* Can rotate 360 degrees freely and smoothly*Uses a quarter-inch ball to circumvent noise.* There are three diameters on your : 3 inches, 4 inches, 6 inchesSpecification:* Material: galvanized sheet* Colour: Black* Optional diameter: three inches, 4 inches, 6 inches* Size: 3 inches 71*71mm, four inches 94*94mm, 6 inches 155*155mm* Quantity: 1PCSPackage content:1 x hole turntableNote:1. The real color of the item may be slightly different from the photographs proven on web page brought on by many points resembling brightness of your video display and lightweight brightness.2. Please enable slight manual size deviation for the data.