Yellow Jacket 49516 - 3-1/2″ Liquid-Filled Manifold Gauge, Blue Compound, 30″-0-300 psi, R22/410A (°F)
With 1% accuracy (Class 1) calibration. Gauges are completely filled with glycerin for maximum protection from pulsation. Large 3-1/2″ (90 mm) diameter gauge with refrigerants color-coded on the dials in bold numbers.