ITEM NAME:1X Dental Mouthguard Trays Bleaching Tooth Whitener Mouth Guard Care Z Features Brand new and high quality. Materials:thermoplastic copolymer. Quantity:2pcs. colour:clear. 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. Size (app):6.3m X 5cm - 2.48inch x 1.97inch. Package Included.1X Teeth Whitening Trays. Place the trays on your teeth to form an impression. Apply the whitening gel in each tray to whiten your teeth.