S & G Tool Aid's Tire Inflator with Dial Gauge features an easy to read, dual calibrated gage with dual calibrated scales 0-120 psi and 0-830 kPa, according to the manufacturer. The dual head chuck is 6" long and is connected to a 13" long hose with a 360 degrees swivel. A protective rubber boot surrounds the dial gauge. Pressure relief valve has a corrosion-resistant brass composition. The inlet is 1/4" Female NPT.