Materials: thermoplastic Quantity: 2 pcs color: clear Size (app): 6.3m X 5cm - 2.48inch x 1.97inch. Package Included: 2 Teeth Whitening Trays Ideal for teeth whitening. Submerge the mouth trays into more than 80C hot water for 5 seconds, remove the tray from the hot water and let it cool for 10 seconds. Place the trays on your teeth to form an impression. Trim the formed trays, cutting at the gum-line. Apply the whitening gel in each tray to whiten your teeth. Making method is as follows 1. Exercise wear dentures: wear the tray to the upper gum, sucking method using exhaust air between the denture and the gums, making the denture can wrap the entire surface of the tooth row. (Twice repeated practice, which is an important process of making tray The lower tray in the same way to practice) 2. Softening tray: the 80 C water into the ground vessel, water depth to be able to handle removed after immersion tray and leave in the water outside is appropriate, the denture immersed in water 5 to 7 seconds. (Denture very soft at the moment, so the immersion time not too long, soft denture made in elongation, slightly starts to deform appropriate) 3. Make mouthpiece: mouthpiece made carefully and quickly put on the tooth gum, sucking law continue to do step 1. Finger pressed denture tooth bonding surface, making it thinner, while the top tight tongue and teeth denture inner surface. (Faster, be careful not to bite hard. Mouthpiece a little hot, but it will not cause any harm) Welcome Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store