Viair 90072 0 - 100 PSI 2" Tire Gauge with Bleeder Valve 2 Inch Tire Gauge Gauge reads 0 to 100PSI Integrated pressure release valve used to deflate air and control tire pressure Used for off-road enthusiasts who deflate their tires to increase traction before hitting the trail. One Year Manufacturer's defect warranty through manufacturer with receipt. Air tank should be used with a drain cock and pressure release valve.