Suitable for 28" Diameter Tires: 4 pack car tire covers ideal for car, trailer, RV, RV and truck tires. Please measure before purchasing. Material: The tire cover is made of high quality material, aluminum coating (reflective material), good at resisting sunlight, and cotton lining to provide you better weather resistant tire cover. Hook design:: The hook and the elastic rear swing allow you to securely attach the tire guard to the wheel even in windy weather, easy to put on and take off. Adjustable:: The spare tire cover is reinforced with straps on both sides. Function: Protects tires and wheels from damage caused by sun, dirt, rust, corrosion and various weather conditions when your vehicle is parked . Keep your wheels in good condition and extend their life.