It can be used on Harley touring Dresser bagger or any motorcycle with air shocks, it also can be used on bicycles.
both gauges are made of die case,
one gauge face dia: 1.5", reads 0-150 psi
2nd gauge face dia: 1" , reads 0-110 psi
reads 0-60 psi .
4.1 Maximum Bar Reading
1 PSI Increments