Fig. Inter. - Figure Interval. Increments between PSI numbers on gauge face.
Grad. Inter. - Graduation Interval. Fractional increments between PSI numbers on gauge face.

Features:

• ASME B40.1, Grade B accuracy (± 3-2-3 % accuracy)
• ABS plastic case
• Bronze bourdon tube / brass socket
• Polycarbonate crystal
• Black aluminum pointer
• Brass movement with polyester segment, designed for extended wear
• Ambient temperature range of -40ºF to 150ºF