China 2.5", 4", 6"Dial Have Blue & Red Colored Cases for Easy Identification Chlorofluorocarbon (CFC) Temperature Scales (R-12, R-22, R-502) Freon Pressure Gauge, Find details about China Pressure Gauge, Corrosion Proof Capsule Pressure Gauge from 2.5", 4", 6"Dial Have Blue & Red Colored Cases for Easy Identification Chlorofluorocarbon (CFC) Temperature Scales (R-12, R-22, R-502) Freon Pressure Gauge