• Never worry about driving on low tires again
• Prevent needless calls to roadside assistance
• You won't have to lift a finger to know when the air pressure is too low

Throw away that old tire air gauge with the flimsy plastic extender! Just keep these Pressure-Indicator Tire Valve Caps on the car, and you'll know when your tires need air just by seeing what color they are. If they're green, you're good to go. But if they're yellow or red, it's time to give those tires a refill.

How do they work? A green cylinder is calibrated exactly to the recommended air pressure level of 34 psi. Once the pressure begins to fall, the green cylinder begins to retract, revealing first a yellow indicator, and later a red indicator. Just put them on the car once, and you'll never have to worry about driving on low pressure again! Sold in sets of four.

• Smarthome does not offer technical support on this product, please contact the manufacturer directly for all product support.
• Defective exchanges for identical item within 30 days of purchase. After 30 days, please contact the manufacturer.