FEATURESHigh quality workplace 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 extra quietly in each course without having for maintenanceSoft roll rubber wheel floor assured to go away no mark on carpets or any sort of pure and engineered wooden floor, tile floor, area of expertise floor, and delicate 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 images showPackage Included:1/5PcsNote:Due to guide measurement, please enable an error of 1-2cm.As diverse computer systems exhibit different colors, thanks on your understanding, the actual product shade may be slightly different from the image.