Keep the original color: the renovator grout markers help to cover the stained joints between tiles, restore or change the color of your tile grout lines, and prevent them from staining further, give your home a neater look Restore clean surface: the grout repair lines dry quickly, will cover the stained joints between tiles and renew the surface after painting, leaving them clean and protected, giving you a different visual experience of your home Quality material: each grout tile pen is mainly made of water-based materials, safe and non-toxic, safe for children and pets The size of the grout wall pen is approx. 15 mm in diameter and approx. 140 mm length, easy to hold For home decoration: the grout restorer pen can be safely applied for kitchen, bathroom, shower stall, porch, patio, wall, floors and many other dirty tile areas, just follow the grout lines to paint, it works on epoxy grout, mortar joints, any grout areas that are starting to get a little dirty and covered in mold