Caster Wheels Replacement,IWMH Hardwood Floor Protecting Office Chair Caster Swivel Wheels Standard Size 11mm Stem Diameter,50mm Wheel Diameter Heavy Duty up to 110 Lb Max Weight, Set of 5,Grey Edge This casters can keep your favorite hardwood floor, carpet, laminate, tile, slatewell protected in your home and office Maximum Weight Rating:100lbs-110lbs/wheel. A set of 5 wheels are more stable and durable Fits Most Office Chair Models Available-Twin wheels diameter: 2(50mm); Stem diameter:7/16(11mm): Stem length:7/8(22mm) Modern black/ gray edge design. The edge is great for smooth movement. Move without pressure and blocking Easy pull and snap installation  3 years Warranty