Product Details  Freon pressure gauges are used in refrigeration application for testing, semicing  freon pressure gauge( gas pressure gauge, oil filled pressure gauge) Freon pressure gauges are used in refrigeration application for testing, semicing,and echarging. Our dial features R-12, R-22 and R-502 OR R-304 scale. Recalibrator and restrictor as standard features.SPECIFICATIONSCASE SIZES:60mm 100mmCASE MATERIAL:Steel with red & blue colorTUBE:Phosphor bronzeSOCKET&MOVEMENT:BrassCONNECTIONS:1/8" &I/4"NPT in LM bottom dependent on model&size, bottom, back,left&right side AVAILABLE RANGES:30"Hg VAC to 150 psi retard to 350 psi:0-500psiWINDOW (LENS) MATERIAL:Threaded polycarbonate lens.ACCURACY:ASME B40. t Grade B (3-2-3%)OPTIONS&ACCESSORIES:Custom dial, metric scale, DIN 2,5% accuracy,special connections and more.