Medium Strength Ideal for Sensitive Teeth. 5.2 oz bottle of 16% Carbamide Peroxide Gel. Refillable syringe. 2 Warm & Form E-Z Trays™. Detailed instructions.Complete Professional At Home Teeth Whitening Kit. It contains one bottle of Whitening Gel, two customizable Mouth Trays; and one Refillable Syringe. This Kit founded the national & International retail whitening category.