The SUPER-PACK of teeth whitening gel comes with 6 syringes of 36% whitening gel. Each syringe contains 10ml/cc of gel good for about 40 individual applications each. All of our gel is made fresh within 1 month of your purchase and is made under the strict regualtions of the FDA. Our gel keeps for 2 years if kept in a cool place such as the fridge. This pack also includes 4 teeth whitening mouth trays (2 sets). Two people can use this pack each receiving an extensive treatment.