Features: These tire pressure monitor caps feature a three color visual alert systems with green indicating normal pressure, yellow for 10% low, and red for 30% low, enabling quick, tool easy tire pressure checks to instantly identify abnormalities. Made from strong stainless steel and glass, they offer erosion resistance, withstand extreme temperatures, and provide general for all vehicle types including cars, SUVs, and motorcycles, with easy manual installation and enhanced sealing to prevent leaks. Designed for car, SUV, and motorcycle owners who prioritize easy tire health monitoring and safety, these tire valves caps cater to everyday drives seeking stable , not fuss accessories. Ideal for daily commutes or off road adventures in harsh conditions like rain or mud, they secure consistent pressure monitoring while acting as protective covers against dust and debris. With lightweight stainless steel construction that avoids affecting tire balance, these car tire accessories deliver peace for stable, high speed driving and long term durability. Specifications: Component : stainless steel + glass Size: about 2.2x1x1cm/0.9x0.4x0.4inch Package Includes: 1 set Car Tire Pressure Cap note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.