100% brand new Material: Chromed Metal Simply install on the air valve According the recognize color to display the pressure of the tyre Fit on any standard size existing tyre valve stem Visually alerts you when the tyre pressure is low to help avoid premature tyre wear or blowouts from under-inflated tyres Sing it makes the tyre of your car more safety Easy to control and install Tire Pressure: 2.4Bar Color: As the picture show Size: Approx. 2.3 x 1cm/ 0.91" x 0.39" (L*D) Indication: Green shows that tyre pressure is normal Yellow shows that the pressure is down about 5 pounds Red alerts you that the pressure is down by at least 10 pounds Installation: Determine the correct tyre pressure for your tyres Inflate tire to correct pressure Install this new pressure cap tight Simply look at the color to know if your tyre pressure is low or normal Note: Due to the difference between different monitors， the picture may not reflect the actual color of the item. Thank you!