FEATURESHigh high quality workplace chair rubber caster wheelUniversally fit all workplace chair bases with mounting holesTwin wheel design enhances weight distribution and delicate operation, ease to glide and swivelSwivel and roll freely and extra quietly in every path without having for maintenanceSoft roll rubber wheel floor assured to depart no mark on carpets or any sort of pure and engineered wooden floor, tile floor, strong point floor, and soft 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 manual measurement, please allow an error of 1-2cm.As different computer systems display assorted colors, thanks to your understanding, the particular product coloration may be slightly diversified from the image.