ARB Small Dial Tire Gauge is the ideal way to accurately measure your tires' PSI when you're making adjustments for off road conditions The tire gauge has quality bronze bourdon tube gauge design ensures accuracy is not affected by changes in temperature, humidity or altitude This tire gauge has fully geared, solid brass precision movement The tire gauge has protective rubber gauge guard and easy to read dual pressure scales, psi and bar This tire gauge is thoroughly designed and tested to ensure accuracy The tire gauge has flexible hose with dual chuck for all rim and valve types gauge reset button