This is an extremely high quality, accurate vacuum pressure gage.
Vacuum gage. Vacuum scale of 0-30 "Hg, and 0 to minus 1 Bar, in kPa
2.5" Diameter with chrome plated steel case. 1/4 NPT Male thread center back mount.
Liquid filled! The glycerin filled gages last much longer and are more accurate because the needle will not vibrate with each pressure pulse.
