Description: 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 wayWildly 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: PlasticSize: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!