describe Net content: 4ml Features Teeth Whitening Pen: Toothpaste is formulated with active ingredients that are gentle and effective. This serum removes surface stains and discoloration that mouthwash can cause REMOVES YEARS OF STAINS: Our professional toothbrush effectively and quickly removes years of stains caused by coffee, tea, wine, soda and more, and its natural scent leaves your mouth feeling fresh. PREMIUM QUALITY: This tooth-safe serum will leave your teeth visibly better with every use while protecting your teeth, making it a great choice for those with sensitive teeth Precise Aiming: The brush head is fine and focused, effectively applying gel to targeted areas on teeth. Make every visible part of your smile whiter Easy to use: The tip of the dental kit has a small brush, which makes it very convenient and easy to "apply" the essence formula directly to the teeth, evenly coating the teeth without making a mess 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 Package Included: 1 * Teeth Whitening Pen