C3 Corvette Chrome Valve Stem Caps C3 Corvette Tire Valve Stem Caps Chrome Painted ABS Plastic w/ C3 Corvette Emblem Why Plastic? No Seize, No Affect on Tire Balance & No Affect on Your TPMS Clam Shell Packaged. Perfect for Gift Giving Set of 4 Caps. Official Licensed Product. Made in the USA