[Universal Size]: These glides for chairs or office chairs have a standard 7/16 \" x 7/8 \" (11mm x 22mm) mounting ring that attaches to a standard stool or stool base. Please measure your size before ordering. [Sturdy and Durable]: The fixed casters can be used on chairs, furniture, and other equipment made of wood, metal, and tubular metal. Each set of 5 glides can support up to 113 kg. [Versatile Glides]: The durable, solid nylon construction glides are designed to withstand more weight on tables, work chairs, cabinets, and more. Fixed glides are ideal for office and home decor. [Quick Installation]: Our replacement glides feature a new spindle design. No tools required. Just pull out the old wheels and insert these. Color: Black Material: Metal + Plastic Package Contents: 5 * Glides are only the above package content. Other products are not included. Note: Light reflections and different monitors may cause the color of the item in the picture to differ slightly from the actual item. The measurement error is allowed to be +/- 1-3 cm.