Tooth bleaching system. Same professional 22% Carbamide Peroxide that denist uses. Get the whiter brighter smile you've always wanted. Do-it-yourself at home. Our Teeth Whitening kit comes with 2 custom moldable mouthpieces that allow you to fit the bite size trays at home in seconds, instead of costly visits to the dentist. The mouthpiece is made from a special polymer and is molded by heating in warm water which makes it pliable to form an exact mold of your teeth. This revolutionary system is long lasting, quick, safe and not harmful to tooth enamel. (Please note that this system only works on teeth and it will not change the color of crowns, caps or fillings.) What you get: 40 Treatments, 1 full 10cc syringe of 22% Carbamide peroxide gel 2 Custom Moldable Trays Step by Step Directions 2 This is everything you need to get your teeth their whitest This is the dental strength 22% Carbamide peroxide gel. This is the same system used by your dentist to get their customers teeth as white as possible.