Features:High quality office chair rubber caster wheelHeavy Duty & Safe fit all office chair bases with mounting holesTwin wheel design enhances weight distribution and smooth operation, ease to glide and swivelSwivel and roll freely and more quietly in every direction with no need for maintenanceSoft roll rubber wheel surface guaranteed to leave no mark on carpets or any kind of natural and engineered wood floor, tile floor, specialty floor, and smooth concreteasphalt floorEasy fit - Just click inSpecifications:Material: Steel and RubberWheel diameter: 73mm 2-78" - Approx 3"Stem Length: About 22mm 78 inchStem Diameter: 10mmand11mm Look at the pictureColor: Black With TransparentPackage Includes: 1 x Chair Wheels