Amflo 150 Straight-On Tapered Chuck Tire Inflator with 12" Hose. Features chrome plated castings with brass internal parts for long life. Solid brass bar is calibrated 10 to 90 PSI in 2 PSI increments. Standard unit for commercial applications. Use only oil free and water free compressed air. Maximum pressure of air source should not exceed 220 psi. Do not use for inflating or checking pressure on air/liquid tires or other tires containing corrosive materials. For use on motor homes and other vehicles with smaller dual wheels.