FEATURESHigh quality office chair rubber caster wheelUniversally fit all workplace chair bases with mounting holesTwin wheel design complements weight distribution and mushy operation, ease to float and swivelSwivel and roll freely and more quietly in every path while not having for maintenanceSoft roll rubber wheel surface guaranteed to depart no mark on carpets or any form of pure and engineered wooden floor, tile floor, forte floor, and comfortable 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 display diversified colors, thanks on your understanding, the actual product color could also be slightly diverse from the image.