Yellow Jacket - Steel case for durability and high-visibility dials with colored temperature scales for easy reading. Flutterless technology with surge protector minimizes the needle pulsation for improved accuracy 1/8" NPT Male connection 3-2-3% accuracy Calibration traceable to NIST standards
Note: Small screw in back is 6/32" x 5/32" Phillips pan head screw. Note: Gauges not meant to be used with nitrogen.
Warning: this product contains a chemical known to the State of California to cause cancer. P65Warnings.ca.gov