Thanks For View This Page That Maybe You Will Choose Your Favor Product Here,We Sure We will Provide You Good Quality,Quick Shipment and Profeional Customer ServiceEnjoy Your Time Here! new and high quality.Material: Chrome MetalSimply install on the air valveAccording the recognize color to display the preure of the tireFit on any standard size existing tire valve stemVisually alerts you when the tire preure is low to help avoid premature tire wear or blowouts from under-inflated tiresSing it makes the tire of your car more safetyEasy to control and installTire Preure:2.0bar/30PSI 2.2bar/32PSI 2.4Bar/36PSISize: Approx. 2.3 * 1cm/ 0.91" * 0.39" (L*D) Indication: Simply install on the air valve to display status via easy to recognize colors;Normal: under standard tire preure situations,Transparent window should be a green,Vehicle normal driving.Warning:The tire preure is slightly lower than the standard of about 10%,Transparent window should be yellow green,Promptly inflatable.Danger:The tire preure is slightly lower than the standard of about 25%,Transparent window should be yellow red. Should immediately check , inflatable. Package content:4Pcs/set Tire Preure Indicator Caps Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.