Smooth, Silent Rolling High-precision ball bearings and polyurethane wheels ensure effortless, noise-free movement across various floor types. Floor Protection Soft polyurethane construction prevents scratches and damage on hardwood, tile, laminate, and carpeted floors. Heavy-Duty Support Robust steel frame and durable materials support up to 650 lbs, accommodating most users and chair types. Universal Compatibility Standard 7/16' (11mm) stem fits most office chairs not compatible with Desky Luminous or Adjustable High Back Mesh Chairs. Set of 5 Casters Includes five 3-inch caster wheels, providing a complete replacement set for enhanced mobility and stability. Easy Installation Tool-free setup simply remove old casters and insert new ones for an instant upgrade. No Need for Chair Mats Glide smoothly without additional floor protection accessories, maintaining a clean office appearance. Durable Construction Engineered with high-quality materials