Features: High-quality office chair rubber caster wheels Heavy-duty and safe fit for all office chair bases with mounting holes Twin-wheel design enhances weight distribution and smooth operation, easy to glide and swivel Swivel and roll freely and quietly in every direction with no need for maintenance Soft-roll rubber wheel surface guaranteed to leave no marks on carpets or any kind of natural and engineered wood floors, tile floors, specialty floors, and smooth concrete or asphalt surfaces Easy fit – Just click in Specifications: Material: Steel and Rubber Wheel diameter: 73mm (2-7/8") – Approx. 3" Stem length: About 22mm (7/8 inch) Stem diameter: 10mm and 11mm (Refer to the picture) Color: Black with transparent detail Package Includes: 1 x Chair wheel set Our products are made with high-quality materials and designed to provide a reliable and smooth user experience.