Safe Material --- Non-toxic water-based ink that helps protect against dark spots and stains, safe for children and pets. Easy to Use --- Shake the pen several times before use, and press down the pen several times until the ink leaks out of the pen, then follow the grout lines to paint. Grout Pen --- Instantly restores color to grout and leaves them looking clean and protected and does not change color for a long time. Protective Barrier --- Grouting pen will cover stained seams between tiles and renew the surface after painting, the stubborn grout stains can be refreshed in a safe and easy way Wildly Usage --- Suitable for the cleaning of the groove of window sash, tiny or narrow gaps, floors and walls in home sink, kitchen, showers and bathroom etc. Specification: Material: Plastic Size: 224x83x29mm/8.82x3.27x1.14inch Package Includes: 1 Piece Tile Marker Pen Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!