Features: 100% Brand New & Nice Quality Dental Bleaching Strips Professional effects and reasonable in price Compact Aize and Easy to use Whiten your teeth, make you more confident 14 pouches,each with 1 upper(Longer One) and 1 lower strip(Shorter One), 28 strips in total Size of the longer: approx. 7.5 x 1.5 cm Size of the shorter:approx. 5.5 x 1.3 cm Package Includes: 1 Box of teeth whitening strip (14 pouches, 2 strips/pouch) NOTICE: The whitening effect from the treatment usually lasts for years. Teeth may darken faster if exposed again to staining products such as tobacco, coffee or juices. However, the teeth will probably remain significantly lighter than if no treatment had been done. Two to four nights of tooth bleaching performed at six month to four year intervals may be all that is necessary.Some difficult, darker stains may naturally require longer treatment than some milder stains. Depending on your teeth and type of staining, results will vary.