FEATURESHigh high quality office chair rubber caster wheelUniversally fit all workplace chair bases with mounting holesTwin wheel design enhances weight distribution and comfortable operation, ease to float and swivelSwivel and roll freely and more quietly in each route while not having for maintenanceSoft roll rubber wheel surface assured to go away no mark on carpets or any style of natural and engineered wood floor, tile floor, distinctiveness floor, and soft concrete/asphalt floorMaterial: PU Rubber and Steel and PlasticWheel diameter: About 50mm (2 inch)Stem Length: About 21mmStem Diameter: About 11mm Grip Ring Type (Look on the picture)Size:As the pictures showPackage Included:1/5PcsNote:Due to handbook measurement, please allow an error of 1-2cm.As different computers demonstrate diverse colors, thank you in your understanding, the particular product colour may be barely diverse from the image.