3ml Hair Applicator Massager Leakproof Alloy Roll Ball Precise Scale Hair Liquid Comb Massager for Essential Oil 1LEAK PROOF: Scalp applicator features precise craftsmanship to ensure that the liquid does not leak. The massage needles are accurately processed for controlled liquid application. 2CONVENIENT TO USE: Hair scalp applicator comb allows you to directly apply the liquid to your scalp, effectively saving your medication and massaging your scalp at the same time. 3RUST RESISTANT AND HYGIENIC: Made with rust alloy resistant materials, this applicator comb is resistant to rust and contamination, ensuring safety and preventing any scalp damage. 4VERSATILE APPLICATION: Suitable for both men and women dealing with thinning hair and hair reduction, this scalp applicator works with various of hair regrowth solutions or serum. 5PRACTICAL AND PORTABLE: It is recommended to use a small amount of liquid multiple times instead of using it as a storage container to avoid wastage. Lightweight, and easy to carry.