Make your teeth whiter with our excel quadruple syringe teeth whitening kit the 40 ml gel can be used to top up on any previous teeth whitening treatment or as a first time treatment. This is the perfect kit for couples or those who simply love to share. This excel kit includes 4 x 10ml syringes, 2 sets of thermoforming trays, with full instructions and a shade card. You can no w get even faster results, why not try our extreme whitening with our 36% teeth whitening gel, with gum barrier included. Get white teeth fast.