Manufactured of Neoprene, the boots are resistant to oil, grease, water, drying, abrasion, and tearing. They are easy to install and fit most front wheel drive passenger cars and light trucks. Each kit includes boot, OE type grease, universal clamps, and easy installation instructions. One size fits most cars. Rapid Turnover, Reduces Inventory, Simple to Catalog, Easy Ordering, Never Obsolete, Saves Space, Durable, No Part Mix-ups