Mechanical Flowmeter, Product Type Mechanical Flowmeter, Accuracy +/-1 Percent, Connection Size 1 in, Connection Type FNPT, Compatible Flow Material Diesel, Gasoline, Oils, Media Temperature - Maximum 150 Degrees F, Media Temperature - Minimum -10 Degrees F, Viscosity - Maximum 9,088 SUS, Housing Material Aluminum, O-Ring Material Viton, Seal Material Viton, Wetted Material Aluminum, PBT, Stainless Steel, Viton, Display Type Mechanical, Flow Rate - Maximum 20 gpm, Flow Rate - Minimum 4 gpm WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer, and Di-isodecyl phthalate (DIDP), which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. - Nickel (Metallic)