Features: 7 inch rubber caster wheels with built in bearings offer superior durability and smooth rolling performances, ideal for air compressors and lawns mowers. Heavy duty rubber construction and precise bearings combine for reduced rolling resistance, while the universally 7" size ensures compatibility with most power tool accessories. Perfect for workshop technicians, landscaping professional, and diyer enthusiasts requiring frequent equipment relocation across uneven surfaces. Enhances mobility in garages, construction sites, and backyard gardens where stable equipment movement is critical for operational safety. Tool less installation design allows immediate upgrades to machinery wheels, delivering vibrations dampening stability without maintenance hassles. Specifications: Component: Rubber, with good wear resistance and elasticity. Diameter :Approx.168mm/6.61inch Thickness:Approx. 92mm/3.62inch Apertures:Approx. 8mm/0.31inch Suitable for various power tools and equipment, especially air compressors and lawns mowers that need to be moved, making it easy to use on different surfaces. Package Includes: 1pcs 7 Inch Rubber Caster Wheel note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.