(It requires a teeth whitening tray from the dentist.) It is not called the product Flash Home Whitening Kit including April 4 (3.0 ml) 16% whitening gel A complete box to protect the ready-made molds manufactured in the clinic Comparison of tooth color before and after bleaching Flash home whitening gel in different concentrations and a variety of great options Contains teeth whitener with carbamide peroxide to give you a bright white smile Comes in different concentrations 10% - 16% - 20% 4 needles of whitening gel for 2-4 uses 1 gel needle for the family, used after bleaching for 20 minutes How to use:- 1- Use your whitening brush well. Before use, apply one continuous drop of the gel approximately in the middle of the front side of the area. 2- Wipe off the excess gel from the agent 3- Duration of uses 30 minutes twice daily 4- So your toothbrush is permanently created and your soft toothbrush cleans any gel from your teeth 5- Rinse your mouth and make sure not to swallow the gel 6- Clean the mold with a soft brush and cold water