Features: Brand new and high quality Material: Chromed Metal Round Style: 36PSI Fit on any standard size existing tire valve stem Visually alerts you when the tire pressure is low to help avoid premature tire wear or blowouts from under-inflated tires Indication:Green shows that tire pressure is normalYellow shows that the pressure is down about 5 poundsRed alerts you that the pressure is down by at least 10 pounds Installation:Determine the correct tire pressure for your tiresInflate tire to correct pressureInstall This new pressure cap tightSimply look at the color to know if your tire is low or normal Size: 1.2cm x 1.2cm x 2.3cm - 0.47inch x 0.47inch x 0.9nch Package Included: 1/2/4 x Tire Stem Cap NO Retail Box. Packed Safely in Bubble Bag.