FEATURESHigh high quality workplace chair rubber caster wheelUniversally fit all office chair bases with mounting holesTwin wheel design complements weight distribution and tender operation, ease to glide and swivelSwivel and roll freely and extra quietly in every course without having for maintenanceSoft roll rubber wheel floor assured to depart no mark on carpets or any type of pure and engineered wood floor, tile floor, area of expertise floor, and tender 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 photographs showPackage Included:1/5PcsNote:Due to guide measurement, please enable an error of 1-2cm.As varied computers show varied colors, thank you on your understanding, the actual product color could also be barely diversified from the image.