Features:High quality office chair rubber caster wheelHeavy Duty & Safe fit all office chair bases with mounting holesTwin wheel design enhances weight distribution and smooth operation, ease to glide and swivelSwivel and roll freely and more quietly in every direction with no need for maintenanceSoft roll rubber wheel surface guaranteed to leave no mark on carpets or any kind of natural and engineered wood floor, tile floor, specialty floor, and smooth concrete/asphalt floorEasy fit - Just click inSpecifications:Material: Steel and RubberWheel diameter: 73mm (2-7/8") - Approx 3"Stem Length: About 22mm (7/8 inch)Stem Diameter: 10mmand11mm (Look at the picture)Color: Black With TransparentPackage Includes: 1 x Chair Wheels Our products are made with the splendid quality materials and are designed to provide you with the best possible user experience. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store