describe: Tile Pen The length of the tile grout pen is approximately 14 cm and the tip size is approximately 4.5 mm. We provide a variety of color options, white, black, beige, gray, dark gray, brown, to meet your daily use and replacement needs. Clean Floors and Tiles These grout tile markers will be applied to the stained joints between tiles and will give the floor a fresh and clean look when painted, playing an important role in improving your home decor. Easy to use Before use, please shake the tile grout pen several times and press with the pen tip until the ink leaks; remember to close the cap after use to prevent the ink from evaporating. PREMIUM MATERIALS Each grout tile pen is primarily made of trusted water-based materials that are safe and durable to serve you for a long time. Wide Application Grout Repair Pen Line dries quickly (1-2 minutes) and works well on epoxy grouts, mortar joints, and any grout area that's starting to get a little dirty and covered in mold.