Your purchase include: 6 -Thermoforming Mouth Trays (3 set) Instruction Sheet This listing for a TRAYS ONLY! (GEL ARE NOT INCLUDED). To purchase gel or a complete kit, please visit: OUR STORE! HEAT SEALED FOR YOUR PROTECTION! Thermoforming Mouth Trays Plastic heat forming reusable mouth tray. This easy to use trays is mainly used for at home teeth whitening treatments. Trays become moldable after being exposed to hot water. 2 trays required per person (1 upper and 1 lower arch). Why Our Product? Always White has been providing quality dental professional strength oral products for 25+ years. Our innovative teeth whitening system supplies users with all the tools they need to safely and affordably whiten teeth at home. Our gels are the same strength used in dental offices which charge $600+ per treatment. . Our gel is made fresh daily with a two year shelf life. . 30 years (3 decades) in the dental field . We formulate with 100% pure formula. No fillers or additives used. MADE IN USA !