Features: Experience quiet , smooth mobility with these heavy duty furniture casters featuring PU wheels and reinforced steel construction, supporting up to 50kg per wheel for noise without movement in any environment. Engineered with rust resistant plating and strong steel cores wrapped in premium PU component , these casters combine industrial strength with quiet operate across hard surfaces. Ideal for homeowners, renters, and commercial spaces requiring stable furniture mobility solution without disturbing quiet zones like offices or libraries. Perfect for effortlessly repositioning bookshelves, office chairs, industrial equipment, or home appliances in noise sensitive areas such as studios, hospitals, or classrooms. The tool without installation systems enables fast setup for cabinets, workbenches, or storage units, making these casters a versatile upgrade for both temporary and permanent furniture applications. Specifications: Component : PU+steel Size: about 1.5inch/2inch/2.5inch/3inch(optional) Package Includes: 4xCaster 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.