Tube test for the determination of Total Nitrogen with the easiest handling available. Precise rapid tests for all kind of water and waste water samples. Time-saving and reliable analysis together with Macherey-Nagel NANOCOLOR photometers. Measuring range: Total Nitrogen - 3–60 mg/L N *This item is hazardous and cannot ship Parcel Post. It is required to ship UPS Ground*Manufactured by Macherey-Nagel