This Teeth Whitening Pen with brush applicator whitens your teeth effectively. Easy to use, completely safe and  works efficiently! The Whitening Pen uses an 18% Carbamide peroxide bleaching gel that is easily applied to the surface of the teeth, one tooth at a time, similar to the way one would apply polish to fingernails. Made specifically for home use, once the gel has been applied to a tooth's surface it solidifies to form a somewhat invisible film which not only whitens but also protects your teeth from food and drink that causes discoloration.This Teeth Whitening Pen with brush applicator whitens your teeth effectively. Easy to use, completely safe and  works efficiently! The Whitening Pen uses an 18% Carbamide peroxide bleaching gel that is easily applied to the surface of the teeth, one tooth at a time, similar to the way one would apply polish to fingernails. Made specifically for home use, once the gel has been applied to a tooth's surface it solidifies to form a somewhat invisible film which not only whitens but also protects your teeth from food and drink that causes discoloration.This Teeth Whitening Pen with brush applicator whitens your teeth effectively. Easy to use, completely safe and  works efficiently! The Whitening Pen uses an 18% Carbamide peroxide bleaching gel that is easily applied to the surface of the teeth, one tooth at a time, similar to the way one would apply polish to fingernails. Made specifically for home use, once the gel has been applied to a tooth's surface it solidifies to form a somewhat invisible film which not only whitens but also protects your teeth from food and drink that causes discoloration.