This standard professional whitening package includes 10 whitening gel 3ml syringe dispensers in 22% Carbamide Peroxide. High viscosity gel provides maximum adhesion to tooth surfaces. Complete instructions included. What is Carbamide Peroxide? Carbamide Peroxide is the primary active ingredient or bleaching agent in the professional whitening gel. It is essentially a variation of Hydrogen Peroxide developed especially for dental whitening. The specially formulated gel provides the chemical reaction required to safely remove stubborn stains due to tobacco, coffee, red wine, tea, foods, yellowing from age and more. High quality USA made 22% whitening gel is developed for fast whitening action and long lasting results. The unique formula is pH balanced with high adhesion qualities designed to stay on tooth surface. The convenient at-home procedure is essentially what a dentist would prescribe. The difference is the cost. Get the radiant smile you desire without an expensive trip to the dentist. Results are long lasting and your satisfaction is guaranteed.