Pressure Gauge, Gauge Type Liquid Filled, Dial Size (In.) 2-1/2, Range 0 to 400 psi, Dial Size (mm) 63, Connection Size 1/4" NPT, Connection Location Lower, Smallest Graduation (PSI) 5, Graduations 50 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, Operating Temp. Range (F) -40 Degrees to 150 Degrees , Series LFS-21