... Words:Teeth whitening pen,Teeth whitening system,teeth whitening bleachingSpecifications: Twist Click Tooth Whitening PenAluminum Casing PP/PE Inner2ml Measured Dose ... %,35%Easy to use, convenient pen delivery100% enamel-safe Just twist to release gel onto built-in brushPerfect for whitening maintenance ... you are going.How to useTo use the pen, just twist the end to release some gel onto the in-built ...