FEATURESHigh high quality office chair rubber caster wheelUniversally fit all workplace chair bases with mounting holesTwin wheel design complements weight distribution and tender operation, ease to flow and swivelSwivel and roll freely and more quietly in each course without having for maintenanceSoft roll rubber wheel surface assured to depart no mark on carpets or any sort of natural and engineered wood floor, tile floor, forte floor, and mushy 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 handbook measurement, please allow an error of 1-2cm.As varied computer systems exhibit assorted colors, thanks for your understanding, the particular product coloration could also be barely diverse from the image.