Docolor Waterproof Eyeliner Pen features an ultra-fine 0.4 millimeter brush felt tip for higher definition | Flawlessly clean lines;easy to use,high precision tip for thin or thick lines;best black eye liner to create the perfect cat eye | Precise Liquid Eyeliner is waterproof, smudge-proof and easy to color, long lasting,no allergies,easy to match different make-up style | Docolor Precise Liquid Eyeliner features a pen that has a continuous flow, providing smooth even lines