Maintain Original Color: Grout pens help cover discolored grout between tiles, restoring or changing the color of your tile grout and preventing further discoloration, giving your home a cleaner look. Restores Surface: Grout repair lines dry quickly, covering discolored grout between tiles and renewing the surface after painting, making them clean and protected, giving you a different visual experience of your home. Quality Materials: Each tile grout pen is made of water-based materials, safe and non-toxic, harmless to children and pets. The size of the wall grout pen is approximately 15mm in diameter and approximately 140mm in length, easy to hold. For Home Decor: The grout pen is safe to apply to kitchens, bathrooms, shower stalls, porches, patios, walls, floors, and many other dirty tiled areas. Just follow the grout lines to paint; it works on epoxy grout, mortar, any areas with grout that are starting to get a little dirty and covered with mold. Package Quantity: There are 6 pieces of the same color grout pens with replaceable tips. These tile repair tools help enhance the beauty of your home decor; enough quantity to use and replace, you can also share with friends or others. Color: Black Features: Wide Application: Grout pens dry quickly; just follow the grout lines to paint; it works on epoxy grout, mortar, any areas with grout that are starting to get a little dirty and covered with mold; can be applied to bathrooms, kitchens, living rooms, bedrooms, walls, floors, windows, etc. How to Use: 1. Shake well before use. 2. The pen tip is pressed vertically until the ink just flows. 3. Wipe and dry the surface before use. 4. Start marking along the tile line. Specifications: Pen Tip Size: 4.5 mm Pen Size: 15 mm in diameter, 140 mm in length Color: as the picture shows