Acid Dentin/Enamel Etch Gel Bulk Kit 37% Phosphoric Acid. Ideal for routine etching and selective-etch procedures, Blue color provides a strong contrast to enamel and dentin, No slump formula, Easy handling, Rinses clean without leaving residue, Includes 12g Syringes, 10 Empty 1.2ml Syringes , and 50 Tips Bulk