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.
3-1/2″ (90 mm) Liquid-Filled Manifold Gauges (°F and °C) Red and Blue
![](https://yellowjacket.com/wp-content/uploads/2015/02/312-90-mm-liquid-filled-manifold-gauges-red-and-blue-968x536.jpg)