FEATURESHigh quality workplace chair rubber caster wheelUniversally match all workplace chair bases with mounting holesTwin wheel design complements weight distribution and delicate operation, ease to go with the flow and swivelSwivel and roll freely and more quietly in every route with no need for maintenanceSoft roll rubber wheel surface assured to leave no mark on carpets or any variety of pure and engineered wood floor, tile floor, uniqueness floor, and mushy 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 at the picture)Size:As the pictures showPackage Included:1/5PcsNote:Due to handbook measurement, please enable an error of 1-2cm.As diverse computer systems show various colors, thanks in your understanding, the particular product coloration may be slightly various from the image.