I bought three sets of these valve covers. None of my cars have a TPMS system and I'm too lazy to constantly check tire pressures with a tire pressure gauge to actually avoid punctures and help with fuel economy. These baseball caps are easy to put on, easy to read, and appear to be well made. The canopy will change color from green (properly inflated or at the pressure the canopy is rated for), yellow for depressurization, and red for severe psi loss or a flat condition. Anyway, when I walk…