Philips Zoom NiteWhite ACP 22% is a professional-grade take-home teeth whitening gel. Formulated with 22% Carbamide Peroxide and patented Amorphous Calcium Phosphate (ACP) technology, it is clinically proven to reduce sensitivity, protect enamel, and enhance the luster and smoothness of teeth. Each pack contains 3 syringes (2.4ml each) of whitening gel.