McMaster 4004K63 Dual Scale Pressure and Vacuum Gauge with Steel Case, 2 1 2" Dial Diameter, 1 4 NPT Bottom Connection, 0–100 psi 72301 9 D Handle Color Black Natural Handle Color Black Natural Tip Width 1 of Hg Environment Temperature Range 40° to 150° F Process Temperature Range 40° to 150° F Connection Type Pipe Pipe Connection Type Threaded Thread Type NPT Gender Male Case Material Steel Connection Material Brass Lens Material Polycarbonate Plastic Accuracy ±2% Accuracy Scale Mid Scale Accuracy Grade B Connection Location Bottom Vacuum Range in Gauges with steel case are more impact resistant than gauges with ABS plastic case