Our Teeth Whitening Gel kit delivers professional at-home whitening. Each 3ml syringe contains 44% carbamide peroxide for fast, effective results with a high-viscosity formula that adheres to tooth surfaces. The kit includes 6 whitening gel syringes.Key details: Shelf life of 2 years with expiration printed on each syringe Store in a cool place or refrigerator to maximize freshness If the expiration date on any syringe is less than a year from planned use, contact us for a replacement gel Whitening gel and syringe dispensers are 100% USA Made Easy Do-It-Yourself procedure with complete instructions included Fast, safe whitening without an expensive dentist trip; guaranteed results