The waterproof grout pen is designed to instantly color and cover discolored, dirty, or old grout. Renew all your bathrooms, kitchen countertops, tile floors, countertops, or walls. It restores the grout to its original color and makes your home look like it did when it was built. You can also change the color of the grout by covering stubborn grout stains. It is environmentally friendly as it is scientifically formulated to be odorless, non-toxic, and safe for your family and pets. It features faster and easier application on straight grout lines to cover mold, mildew, and stubborn stains, and it also helps prevent further mold growth with its antimicrobial material. Size: 140 mm Line width: 2.0 mm Features: Water and light fastness, quick drying and color fastness Keeps ink colors bright and strong. Scope of application: suitable for tile and marble tiles Accidental scratches and stains are filled and repaired. Package Contents: 2 Tile beauty pens Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship all orders within three days of purchase, and the estimated delivery time is 8-15 days. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and description, we have provided detailed information about the product, including its features and specifications. We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please do not hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it.