PRO-SYS® In-Office Whitening 30% Hydrogen Peroxide- Dual Barrel System No refrigeration needed Dual-barrel which means no manual mixing Instant activation Gingival protection guarantees patient comfort Includes potassium nitrate and fluoride to further eliminate sensitivity Features active calcium ions that promote remineralization Includes: (1) 3.8ml dual barrel syringe (3) mixing tips (1) 1.2 ml barrier syringe (1) lip protection cream (1) pre-bent tip (1) cheek retractor