brand new and high quality 2Pcs Thermoform Moldable Mouth Teeth Dental Trays Tooth Whitening Guard Whitener Description: Specifications： Material: Food-grade Silicone Color: Clear Size: 6.5 x 6 x 1.3 for cm / 2.55 x 2.3 x 0.51 " Two mouth trays: One for upper teeth and one for lower teeth Great to prevent teeth grinding at night and whiten teeth Usage instructions： 1. Place the tray into hot water about 70°C for 10-15 seconds to soften and remove from the water 2. Place the trays into your mouth and press the bonding surface of tray and gum. The tray is now moulded 3. Cut the for extra at the impressed gum-line and finish making the tray Quantity: 1 Pair Note： 1. If the tray is not made well, you can repeat the process for the second mould. 2. Please clean the tray with water before using. 3. The replacement for time of the trays is 3-4 months. 4. It is normal to feel discomfort for the first for time to wear the tray. You will get used to it after several times. 5. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 6. Please allow 1-3mm measuring deviation due to manual measurement. Package includes: 2 x Mouth Trays