Feature: Material: Stainless steel Pressure Range: 32psi, 2.2Bar 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. Color Indication: Greenshows that tire pressure is normal. Yellowshows that the pressure is down about 5 pounds. Redalerts you that the pressure is down by at least 10 pounds. Size:2.5cm x 1cm (approx). Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, Thank you. Package Included: 4 PCS 2.2 bar