Constructed with low lead brass. Accurately measures 0 to 100 psi (pounds per square inch). For hydraulic and pneumatic installations. Gauge is completely enclosed in a corrosion resistant polypropylene housing which resists rust and electrolytic action. Each gauge features an easy to read dial and 1/4 In. MPT (male pipe thread) fitting. Manufactured to include no more than 0.25% weighted average lead content on wetted surfaces.