·Instantly check tire status at a glance with our intuitive three-color eye alert tire pressure valve stem caps; made of durable chrome-plated metal and polycarbonate (PC); package includes 4 pieces per set

·Each valve stem pressure cap is precisely calibrated to 36 PSI / 2.4 bar with clear color coding: Green = Normal Pressure, Yellow = 10% below standard, Red = 25% below standard; transparent window for easy reading in any lighting conditions

·These visual tire pressure caps eliminate the need for bulky manual gauges and save you time every day; no tools are required for installation—simply screw them onto existing valve stems.

·Our car wheel tire valve caps help prevent tire blowouts and extend tire life by detecting underinflation early; they improve vehicle handling and safety for daily commutes and long road trips.

·These tire indicator caps have a universal fit for all standard Schrader valves on cars, motorcycles, bicycles, and SUVs; Important: Remove the caps before servicing the vehicle to prevent losing the black washers