Primefit PGF200B14 Glycerin Filled Bottom Mount Pressure Gauge with 200-PSI NPT, 1/4" Large, 2.5-inch gauge with a 1/4-inch male NPT bottom-mounted air inlet Accurately displays air pressure from 0 to 200-PSI Glycerin Filled housing protects internal components from damage due to vibration Comes with a 1-year limited warranty