1. with a mixing tip, will mix the gel accordingly when you push the syringe
2. very convenient to use,no need to mix by hand
3. High percentage and inside catalysis ingredient ,get best whitening effect
4. can be sealed when you do not use,keep long activity of the whitening gel.
5. Fast, safe, effective whitening without an expensive trip to the dentist. 100% USA Made Gel and Dispensers.