D7963 Pressure Gauge Liquid Filled 2-1/2 in 0 to 160 psi Connection Size 1/4 in NPT Connection Location Lower Smallest Graduation 2 psi Graduations 20 psi Accuracy +/-1 Percent Case Material Zytel Nylon Case Color Black Socket Material Brass and Buna-N Tube Material Copper Alloy Lens Material Polycarbonate Ring Material Twist On Zytel Nylon Operating Temp Range -40 Degrees to 150 Degrees F Series LFS-210-KemX Includes Buna-N Anti-Freeze / Anti-Clog Barrier