Compound Gauge, Gauge Type Liquid Filled, Dial Size (In.) 2-1/2, Range 30" Hg Vac to 30 psi, Dial Size (mm) 63, Connection Size 1/4" NPT, Connection Location Lower, Smallest Graduation (PSI) 0.5, Smallest Graduation (In. Hg) 1, Graduations 5 psi, Accuracy (%) +/-1, Case Material Zytel Nylon, Case Color Black, Socket Material Brass and Buna-N, Tube Material Copper Alloy, Filled With Glycerin, Lens Material Polycarbonate, Removable, Ring Material Twist On Zytel Nylon WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov -