K4563 Pressure Gauge Welding Dial Size 2 In (51mm) Range 0-30 psi /2 bar (Red Zone) Connection Size 1/4 In (6mm) MNPT Connection Location Bottom Smallest Graduation 1 psi Graduations 5 psi Case Material Steel Case Color Black Socket Material Brass Tube Material Phosphor Bronze Lens Material Polycarbonate For Use With Pressure Regulators Manufacturers Warranty Length 1 Year