Low Side Gauge, Diameter 2 1/2 in, Working Pressure 30 in Hg to 250 psi, Connection Size 1/8 in, Color Blue, Gauge Type Low Side Gauge, Gauge Accuracy +/-3-2-3 Percent, For Use With R-134A, R-22, R-404A, Application Replacement Manifold Gauge for Manifold Gauge Sets Replacement manifold gauges for low side manifold gauge sets.