Universal, fits on all vehicles and bicycles Made of aluminum with an internal neoprene o-ring and a gloss black coating height 18mm / width 11mm Rustproof, Heavy Duty, Easy to Install Attention all Pittie Lovers! Check out these Pittie Pitbull Dog (Style 12) Tire Valve Caps! Perfect for any pittie mom or dad. These Pitbull Dog tire valve caps are made of black aluminum, they are rustproof and feature an internal neoprene o-ring to protect your valve stem. Plus, they fit any Schrader valve stem, making them universal. With their Pitbull art design, they are sure to stand out. They are easy to install and perfect for any vehicle. Need pitbull gifts? These make a great gift for any pitty mom or dad. A must have for pitbull owners.