Features Brand new and high quality. Materials: thermoplastic copolymer. Quantity:4pcs=2Pair 1bag. Color: Clear. Size (app):6.3m X 5cm - 2.48inch x 1.97inch. Package Included 2 Teeth Whitening Trays 1Pair Self made heat curing molding of dental whitening denture accessories Made of imported medical food grade silicone, it is safe, non-toxic, and has no side effects; Method of making dental braces: 1. Soak the dental support in warm water at around 70 degrees Celsius for 10-15 seconds to soften it. Be careful not to use hot water that is too hot at 90 degrees Celsius, as this can cause the dental support to wrinkle into a ball. When you see the edge of the dental support wrinkling, you can remove it; 2. Put the softened dental support into your mouth, put on the gums, suck and expel the air between the dental support and the gums, and use your hands to firmly press the joint surface between the dental support and the gums back and forth to make it closely fit with the gums. The dental support made in this way is suitable for the shape of your teeth. Pay attention to the speed, but do not bite hard; 3. After pressing it with your hand, hold it for about half a minute, and at this time, you can remove the already shaped dental tray; 4. Along the gingival line (the line between the teeth and the gums) stamped on the already shaped dental holder, use scissors to cut off the excess material, and cut off the handle at the same time. At this time, the dental holder is completed. Cutting off the part above the gingival line can make the gel only contact with the teeth to avoid damaging the gums be careful: 1.If the dental bracket is not made well at once, the second shaping can be repeated until satisfactory; 2. Before and after using the dental support, please rinse it with clean water; 3. The replacement time for dental braces is 3-4 months, the same as for toothbrushes; The first time you wear a dental brace, you will definitely feel uncomfortable. Just stick to it a few more times and get used to it s