FEATURESHigh quality workplace chair rubber caster wheelUniversally match all workplace chair bases with mounting holesTwin wheel design enhances weight distribution and smooth operation, ease to drift and swivelSwivel and roll freely and extra quietly in each course without needing for maintenanceSoft roll rubber wheel floor assured to depart no mark on carpets or any variety of natural and engineered wood floor, tile floor, forte 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 on the picture)Size:As the images showPackage Included:1/5PcsNote:Due to guide measurement, please allow an error of 1-2cm.As varied computer systems reveal diverse colors, thank you on your understanding, the particular product color could also be barely diversified from the image.