【Brand New, Unopened】Crystal Bihaku Pack Crystal Whitening Pen, Set of 2 【Product Overview】 The Crystal Whitening Pen is an easy-to-use whitening product. It contains two 2ML pens and is easily applied with a twist-type applicator. 【How to Use】 Before use, twist the pen to dispense the whitening gel from the applicator. By incorporating it into your daily care routine, you can achieve whiter teeth. 【Effects and Features】 With continuous use for more than two weeks, it effectively removes yellowing and stains, allowing you to experience a beautiful smile. Its compact size makes it convenient to carry, so you can easily use it at the office or on the go. - Product Name: Crystal Whitening Pen - Contents: 2ML - Quantity: Set of 2 - How to Use: Twist-type applicator - Effect: Whitening effect with use for more than 2 weeks - Features: Convenient to carry and can be used at the office Please understand that this item is stored at home.