FEATURESHigh high quality workplace chair rubber caster wheelUniversally match all office chair bases with mounting holesTwin wheel design enhances weight distribution and mushy operation, ease to glide and swivelSwivel and roll freely and extra quietly in each route without having for maintenanceSoft roll rubber wheel surface guaranteed to leave no mark on carpets or any sort of pure and engineered wooden floor, tile floor, strong point 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 pictures showPackage Included:1/5PcsNote:Due to guide measurement, please enable an error of 1-2cm.As varied computers exhibit assorted colors, thank you in your understanding, the particular product coloration could also be barely assorted from the image.