Tooth Whitening System - 3 Patient Kit - with Retractors. Includes: 3 - 2.8mL Pola Office+ Syringes (37.5% Hydrogen Peroxide Double Barrel Syringes), 3 - 1g Gingival Barrier Syringes, 3 Optragate Small Cheek Retractors and Accessories. 3 - Patient kit