Detailed Product Description We can supply all kinds of pressure gauge for air pump, and give our customer best quality and low price.PRESSURE GAUGE FOR AIR PUMPDIAMETER 1 1/2'' , 2'' , 2 1/2''RANGE 0-15psi......350psiINLET THREAD 1/4'', 1/8'', NPT BSP BSPT M8x1 M8x0.75SCALE PSI, Bar, Mpa, Kpa, kg/cm2CONNECTION bottom connection, center back male connection