Tests for: Leukocytes, Nitrite, Protein, Ph, Blood, Specific Gravity, Ketone, Glucose. Clear color changes in the clinical decision range. Highest quality through rigorous quality standards and modern state-of-the-art automated production facilities. The comparison scales of our test strips are manufactured according to the enamel-printing method, assuring highest color-constancy and comparability. Vitamin C Resistant. Long Shelf Life. Tubes of 100.