Premium Quality Tire Pressure Gauge, Ampper 2" Large Dial Straight Angle Brass Bezel Tire Gauge - 100 PSI (Black) Ampper COMPACT sealed HEAVY DUTY tire pressure gauge, accurate reading up to 100 PSI, easy to use. ANSI B40.1 International Accuracy Standards ( 2%). Be quickly when you screw or unscrew the item, a little of the air will leak. It's normal for the item, designed to read the value easier, and benefit for pressure release. Built-in air bleeder valve to release pressure in overinflated tires. 9.85" Flexible reinforced hose with handy 360-degree swivel chuck allows for easy access to the tire valve from any angle. No batteries required, large 2" dial make it easy to read, steel construction supported by premium rubber for collision protection. Kindly pls note: the Lb/in2 is the pounds per square inch (PSI); pls pull the brass bezel if it is too tight to screw.