Ashcroft 451379ASL04L30# Pressure Gauge, 0 to 30 psi, 1 2 in MNPT, Plastic, Black GS 3 Silver Braze Size (Maximum) 4 Silver Braze Size (Maximum) 4 in This 3 8 in Water and Wastewater Freeze Resistant Movement No Primary Pressure Range 0 to 30 Non Sparking No Lens Material Gauge Glass Process Temperature Range 20 Degrees to 150 Degrees F Case Construction Solid Front with Pressure Relief Back Primary Pressure Scale Color Black Gauge Case Liquid Glycerin Dial Face Material Aluminum IP NEMA Rating IP66 Range 0 Degrees to 150 Degrees F Gauge Panel Mountable No Gauge Connection Location Bottom Case Material Epoxy Coated Aluminum Socket Material Brass Pressure Range 0 to 30 psi Standards ASME