【About Purchase and Use】 These caster covers are 5cm in diameter and 1.5cm wide, and come in a set of 8. Before purchasing, measure the diameter of your suitcase wheels and ensure there is at least 4mm of space between the wheel and fender, and at least 3mm between the wheel and axle. These tire covers are designed specifically for double-wheel casters; please note that they are not compatible with single-wheel casters. 【Prevents Caster Wear and Extends Lifespan】 Made of flexible, high-quality silicone material, these caster covers protect your casters from wear and scratches during daily use and travel. They prevent caster deterioration, allowing you to use your suitcase for longer. 【Noise Reduction for a Quiet Journey】 The line pattern design on the cover surface absorbs impact and reduces noise. Avoid disturbing others in the morning or late at night, and enjoy a quieter journey. 【Easy Installation & Cleaning】 Simply stretch the caster cover and install it in seconds. If the wheel cover gets dirty, wash it with water and air dry it for reuse. After using your suitcase, removing the caster covers prevents outside dirt from entering your home, keeping your interior clean. 【Anti-Fall Design】 The side width of the tire cover is expanded to increase the area that wraps around the wheel, preventing it from falling off the caster. [Axita] Set of 8 Suitcase Caster Covers, Tire Covers, Silent Silicone Covers, Wheel Protection, Noise Reduction, Scratch Prevention, Dirt Prevention, Easy Installation, Wheel Covers for Travel (Black) 822245