Gel Etchant Economy Pack Gel Etchant Economy Pack Contains: 30g Gel Etchant syringe 37.5% phosphoric acid, 2 empty intraoral syringes, 30 x disposable tips & 1 x luer connector.Gel Etchant Economy Pack Contains 30g Gel Syringe 37.5% phosphoric acid 2 x empty intraoral syringe 30 x disposable tips & 1 x Luer connector