Color-coded scales Sliding double "O" ring pistons reduce wear Long life nylon seats Manifolds are also available with larger, easier to read 3-1/8" color-coded gauges in rugged steel cases with polycarbonate crystals. These gauges feature 1% accuracy (class 1) for an exact reading in critical charge systems. Forged brass body for durability. Full porting maximizes capacity and flow. Some models include color-coded, 60" plus II hoses with standard 1/4" flare fittings. Hose assemblies UL recognized for 4000 psi (275 bar) burst and 800 psi (55 bar) working pressure.
Like many reviewers have stated before, this unit is really well built and should last a long time. My gauge definitely says Made In USA on the readout. I used it only once for installing a Mini Split AC system.