Series 41 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.3-1/8" Gauge, 800 PSI Working, 4000 PSI Burst, Forged Brass, 2-Valve, R-22/R-404A/R-410A, Refrigeration Charging Manifold with 60" PLUS II Red/Yellow/Blue Hose and 1/4" Flare Standard Fitting