The listing is for one Air shock pump. it is used to adjust air suspension pressure in front or rear suspensions.<br /> <br /> It can be used on Harley touring Dresser bagger or any motorcycle with air shocks, it also can be used on bicycles.<br /> <br /> gauge is made of die case, face dia: 1.5"<br /> <br /> reads 0-60 psi (also 100xkPa).<br /> <br /> 4.1 Maximum Bar Reading<br /> <br /> 1 PSI Increments<br /> <br /> overall length is about 9", takes very little room in your storage bag.