Yellow Jacket 49137 3 1/8" Manifold Gauge R404,410,R22
For reliable performance and durability, this 3-1/8" Pressure replacement  gauge (F)is housed in a red steel case  with front recalibrator screw.High visibility colored temperature scales are easy to read through the full  view polycarbonate crystal.Flutterless technology with brass surge protector (to minimize needle    pulsation), brass gauge movement and copper alloy bourdon tube combine for    improved accuracy1/8" NPT Male connectionCalibrated to 1% accuracy at the plant0-800 psiFor use with R-404A, R-410A, R-22 Refrigerants