Caster Wheels Heavy Duty with Rubber Casters Perfect for Hardwood Floor and Office Chair. Replacement Easy Glide Set of 5 Inserts with Swivel Universal Fit 3 Inch Grip Ring Stem SAFE FOR ALL FLOORS Protect your floors with our soft & strong high-grade polyurethane wheels. If you're worried about your office chair scratching up your hardwood floors, fear no more. CASTER WHEELS 3 Inch rollerblade style replacement set of 5 with 5-star PP core to help roll quietly and easily HEAVY DUTY Easy glide caster wheels with black electro coating on forks that help carry more weight even on concrete and tile floors HARDWOOD FLOOR PROTECTION Avoid clogging and picking up debris with the transparent rubber style easy clean polyurethane wheels 100% MONEY BACK GUARANTEE Your Total Office Casters are backed by 100% guarantee that you are fully satisfied with your product or receive your money back OFFICE CHAIR CASTERS with 7/16 inch wide x 7/8 inch tall grip ring stem (11mm x 22mm) universal easy fit that always ships from the US