[Anti-leak and Satisfied Service] The edge is designed to be tightly sealed and will not allow liquid to overflow or leak. If you have any problems with this hair scalp applicator comb, please email us freely, we will give you a satisfied after-sale service. Note: this is not design for liquid storage, please use out of all liquid each time, or it may lead to the liquid get bad or other problems. [Waterproof & Easy to Clean] The mouth filling hole of the hair oil applicator comb is 22mm big, convenient for clean and liquid filing. It is made of ABS, silicone and stainless steel, durable and waterproof, no problem to wash the whole body. [Easy to Grab & Portable] The surface of the hair scalp applicator brush is “S” ergonomic body design, not easy to slip, you can grab the body easily. Smooth liquid discharge, no battery required, slim and lightweight, it is portable to carry any where. [30ML large Liquid Tank with Visual window] The scalp hair liquid comb is built-in a 30ml liquid tank in where you can put hair nutrient solution, essential oil, hair conditioner ext. It is big enough to meet one time treatment usage. With visual window, let you know how much liquid left inside, to avoid waste of liquid. [Multifunctional Hair Brush] Kimairay scalp hair brush is design to brush hair with hair care nutrient solution or oil, making the liquid deeply reach your hair root and massage the scalp, which can stimulate scalp cells and anti hair loss. Reduce waste of liquid and avoid mess, say good bye to traditional spray method, an ideal gift for your friends or family.