Anti theft logo valve stem caps set comes with 4 caps with 2 durable keys. Each air valve cap has a insert with a Buna O-Ring for a proper air tight seal. The outer logo cap operates independently of the insert. If someone attempts to remove a valve stem cap without the key, the outer logo cap merely spins as if stripped. These Chrome finish Logo Valve Stem Caps add finishing touch to your wheels. Full color, highly detailed logos are permanent, fade- proof, waterproof and protected by a scratch-resistant polycarbonate coating as used in jet fighter canopies. Precision engineered and plated to show quality specifications. These are made of ABS plastic & do not interfere with TPMS Tire-pressure monitoring system. This set includes 4 air valve caps.