Freon pressure gauge are used in refrigeration application for testing, semicing,and ... -tures R-12, R-22 Type :KP016 (Freon Pressure Gauge)Application:Freon pressure gauges are used in refrigeration application for testing, semicing,and ... -502 OR R-304 scaleDial size:2.7", 3.15",Pressure range:30"Hg VAC to 150 psi retard to 350 ... filled: -20 to 60 ;siliconee filled: -40 to 60 Freon pressure gauge