Check the listing for details. Advanced Teeth Whitening Strips (4 Strips) 2 Upper and 2 Lower~Hydrogen Peroxide. Condition: New. Listed at 5.97 USD. Advanced Teeth Whitening Strips (4 Strips) 2 Lower and 2 Upper~Hydrogen Peroxide ---Model Number: MR-45 ---Includes 2 Sealed Pouches each Pouch includes 1 Upper and 1 Lower for two treatments ---Advanced Teeth Whitening Strips ---Gel Type ---6% Hydrogen peroxide ---Use 30 minutes a day Features: ---Double Elastic Gel Strips ---Full Detailed Usage Instructions ---Enamel safe ---Easy to Use ---Mint flavor Usage guide: ---Allow at least one hour after brushing teeth before using the strips ---Do not reuse the strips. ---The ingredients of the strips are safe even if some gel is swallowed. ---Please wet the strip in case it is hard to peel off from teeth. Caution ---Do not use the strips if suffering from dental ulcers, broken gum, or after oral surgery. ---People with sensitive teeth should use the strips under the guidance of your dentist.