Etching Gel, 37.5% Phosphoric Acid, Syringe Kit, 3 g, Purple, 3/Pk, 31297About this product Reliable material with superior efficiency Permits easy handling and delivery Color vibrance boosts visibility Avoids cross contamination Gel Etchant contains 37. 5% Phosphoric Acid for remarkably effective etching of dentin and enamel. It features enough viscosity for it to remain in place, prevent separation, and allow hassle free rinsing. Each Gel Etchant Pack includes 3 (3 g) Syringes and 30 Disposable Dispensing Tips.