There is a wide variety of commercially available bleaching systems depending on the bleaching agents used.
ProWhite 35% TOWER Whitening System comes at the price of $59.99 including 3-Syringe Pack of 35% whitening gel and is designed for home-use. This is a good system for those who tend to use a lot of bleaching gel. ProWhite [...]

Bleaching gels are generally two types depending on the bleaching agent they contain - hydrogen peroxide or carbamide peroxide. Both chemicals are most commonly used in a 35% solution. Various combinations and concentrations of the above materials are commercially available in view of customers’ preferences.
Power bleaching gels containing 35% hydrogen peroxide have certain benefits before [...]