Features: Experience quiet mobility with our rubber coated furniture casters, featuring alloy cores for heavy duty use up to 150lbs, perfect for noise sensitive homes and offices. The 360 degree rotates design ensures effortless multidirectional movement, while pre installed screws enable tool easy attachment to desks, chairs, or cabinets in seconds. Ideal for parents with sleeping babies, pet owners, and enthusiasts seeking stable hardware upgrades for household furniture. Effortlessly glides storage ottomans across hardwood floors or reposition office chairs in cramped workspaces without disturbing others. Engineered with not toxic, materials, these quiet rolling casters combine industrial grade durability with residential safety standards for worry without daily use. Specifications: Component : rubber, alloy Model: 0.5 inch/0.7 inch/1 inch(optional) Package Includes: 1 set small Directional Wheel note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.