Perfecta Rev Refresher Pak 15 Min Daily - 6 pk of 1-3Cc SyringesCONTAINS: One 3cc syringe with 4oz (118. 3ml) REV! Finishing Rinse. 15 minutes, once a day to your whitest smile! Step 1 REV! Gel This patented 14% hydrogen peroxide formula delivers proven whitening results1 with the shortest wear time of any professional whitening product. REV! gel is water based to hydrate the teeth as it whitens and to avoid thermal sensitivity naturally. Step 2 REV! Finishing Rinse This refreshing mouth rinse is formulated for