Specifications: 4ml/0.13oz.Scope of application: Suitable for people of all ages.Function: Remove yellow stains on tooth surface and whiten teeth.Features: Mild, non-irritating, easy to carry.describe.This teeth bleaching gel is your solution for instant teeth whitening! Say goodbye to stains and yellow teeth with ease. It's small, easy to use, and doesn't create any mess or waste. Plus, theres no discomfort whatsoever!Comment:1. Manual measurement tolerance is 2-5g. Please don't mind your substitution.2. Due to differences between different monitors, the image may not reflect the actual color of the item. Thank you so much!3. SKU color is the color of product packaging.List:Teeth Whitening Pen