Stealtho Advanced Office Chair Wheels Set Of 5 - Protect Hardwood Floor Carpet U.S. UTILITY PATENT: Castor system for moving furniture. We reconsidered mechanical design castors engineering. Unique design free from analog roller blade wheels issues. Polyurethane material for floor protection quiet operation easy installation EXPERIENCE FREEDOM from Plastic Chair Mats - High-tech elastic urethane of our gaming chair wheels-set makes movements easy and noiseless. Enhanced durability and floor protection ensure a seamless long - lasting glide for any office setting SMOOTH QUIET CABLE CROSSING: Our patented office chair swivel wheels are designed to protect your hardwood parquet laminate linoleum tile or low pile carpet. These casters glide smoothly safeguarding your floors and preserving phone cables HEAVY-DUTY office chair wheels feature a new geometry rubber roller casters and a Japanese steel body, withstanding up to 600 lbs. The caged bearings prevent bearing balls from scattering across your floor EASY to INSTALL NO TOOLS REQUIRED: Our rollerblade office chair wheels fit 99% of desk chairs. DON'T fit IKEA. Please make sure it is compatible with your computer stool and check the size our stem is 7/16" x 7/8" inch