FEATURESHigh quality workplace chair rubber caster wheelUniversally match all workplace chair bases with mounting holesTwin wheel design complements weight distribution and smooth operation, ease to flow and swivelSwivel and roll freely and extra quietly in each path while not having for maintenanceSoft roll rubber wheel floor guaranteed to leave no mark on carpets or any style of pure and engineered wood floor, tile floor, distinctiveness 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 pictures showPackage Included:1/5PcsNote:Due to guide measurement, please enable an error of 1-2cm.As different computers show assorted colors, thanks in your understanding, the actual product shade could also be slightly assorted from the image.