oil filled pressure gauge 1.size:1.5", 2", 2.5", ... 3", 4", 5", 6" 2.case:SS304 3.internals: brass 4.liquid filled pressure oil ... filled pressure gauge1.size:1.5", 2", 2.5", 3 ... steel10.dial and pointer: aluminum11.window: glass, polycarbonate12.pressure range: vacuum, 4psi-15000psi13.accuracy: 1%-1.6% ...