Ultra Seal Custom Fit Dental Teeth Whitening / Bleaching Trays (Upper & Lower Trays) with individual tooth Reservoirs for most advanced consistent and comfortable whitening experience. Save over 75% on Dental Prices. No Dentist visit required. Trays manufactured by experienced personnel. Individually custom made to fit your mouth. Ensures whitening gel doesn't run. Available in 1mm or 1.5mm thicknesses for increased durability. Simply add the whitening gel to your dental trays. Easy to use Home Impression System. Easy Ordering Process: 1) We'll send you out an easy to use home dental impression kit. (Same day dispatch Mon ? Fri) 2) Follow the easy step by step instructions to complete your impression 3) Send your impression to us 4) We manufacture your custom fit trays in 7-10 days. Free Postage of impression kits and final product. If you have any questions please contact us or visit our Amazon store. Tooth Whitening, Teeth Whitening, blanchiment des dents, het bleken van tanden, Zahnaufhellung, para blanquear los dientes, tandblekning Please note that the denLAB self-impression system is not suitable for people with crown, bridgework or fixed orthodontic appliances.