You can check your tire's air pressure. The bourdon tube movement is not affected by changes in temperature humidity or altitude. We sometimes take for granted our important our cars are and forget at times how much rides (literally and figuratively) on the strength of our tires. Make sure that the tires that carry your family to picnics soccer games and school plays are in the best shape with the best tire gauge on the market. - Accurate professional Tire Pressure Gauge - Metal cased Pressure Gauge - Shockproof and vibration resistant - Used to measure the pressure of tires on a vehicle - Easy to read 0-100 psi and 0-7.5 bar dial markings - Come with a protective plastic case