... 3.Suitable for American/US valve Precise Double Units Kg/cm2 Psi Rubber Tube Vacuum Pressure ... precision,high durability8.Mark KBS LBS two pressure units,suggest reading all kinds of vehicles inflatable tyre ... pressure is too high,pls press down the air valve,make adjustment5.The measurement,twist the copper ... head,press down the air valve,click zero,twist back to the original ...