This standard professional whitening kit includes 3 extra large 10ml whitening gel syringes in 44% strength Carbamide Peroxide. * It would take 10 of the standard 3ml whitening syringes to equal that amount of gel. High viscosity gel provides maximum adhesion to tooth surfaces. Moldable dental impression trays are designed for wear comfort and provide precision teeth impressions. Storage case and instructions included. Whitening gel syringe dispensers and moldable dental impression trays are USA Made. Dispensers are manufactured by Becton Dickinson (NYSE:BDX) a US based company, the whitening gel is a dental industry standard utilized by clinics and offices throughout the USA and internationally. Gel is produced under strict laboratory environment and ongoing quality control checks ensure a consistent, professional application. Bleach Pro is a licensed insured supplier of quality whitening kits, gel and accessories since 1999. 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 44% whitening gel is the strongest concentration available and is not recommended for people who have not experienced peroxide based whitening previously. It has more potential for tooth sensitivity and irritation to gums. Gel provides the chemical reaction required to safely remove stubborn stains from tobacco, coffee, tea, red wines, foods, yellowing from age and more. The unique formula is pH balanced with high adhesion qualities designed to stay on tooth surface. The at-home procedure is essentially what a professional 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. We strive to provide exceptional customer service.