Safe material --- Non-toxic water-based helps prevent dark spots and stains and is safe for children and pets Easy to use---Shake the pen several times before use, press down the pen several times until the leaks out of the pen, and then paint according to the grout line Wear-resistant acrylic pen tip, used to beautify the gaps between tiles and marbles The color is bright and lasting --- make the gap look clean and protected, and will not change color for a long time, water and light resistance Wide range of uses-suitable for cleaning sash grooves, small gaps, floors and walls in household sinks, kitchens, shower rooms, bathrooms, toilets, etc. Specification: Material: Plastic Size(LxW): Approx. 140x15mm/5.51x0.59 inch Diameter of pen tip: 4.5mm/0.18 inch Writing width: 3mm/0.12 inch Package Includes: 5 Pieces Tile Marker Pens 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