GPI 139121-06, QM240N10, 2 – 40 GPM (8 – 150 LPM)Flow Range, 1 in. connection size, FNPT Connection Type, -40 to 125 Degrees F Fluid Temp. Range , 50 PSI Max. Pressure, 44.0 SSU Max. Viscosity, Aluminum Housing, Aluminum fitting, Aluminum Chamber Material, Buna N seal Material, 999.9 Maximum Batch Total, Mechanical Display, Postitive Displacement Oval Gear, Accuracy +/– 0.25% of reading