FEATURESHigh high quality workplace chair rubber caster wheelUniversally fit all workplace chair bases with mounting holesTwin wheel design complements weight distribution and comfortable operation, ease to waft and swivelSwivel and roll freely and extra quietly in every route without needing for maintenanceSoft roll rubber wheel surface assured to leave no mark on carpets or any sort of natural and engineered wood floor, tile floor, area of expertise floor, and smooth 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 images showPackage Included:1/5PcsNote:Due to handbook measurement, please enable an error of 1-2cm.As assorted computers demonstrate different colors, thank you for your understanding, the particular product coloration may be slightly various from the image.