Wheel accessories separates from a kit. New in bulk packing. The item may be slight scratches on the surface due to transportation and storage, please understand. Size: about 1.1×2.3cm / 0.43 inchx0.9 inch(DxL). Wheel Diameter: about 6cm/2.36inch. Standard Stem Length:about 7/8 inches / 22mm. Standard Stem Diameter:about 7/16 inches / 11mm. 360 Degree Swivel Rotation, fits all office chair bases with 7/16 inch (industry standard) mounting holes. 5 x Caster Wheel. Tracking numbers will be uploaded to the order page and a notification sent. Please note, tracking numbers can take up to 24 hours to show progress.