Use range: these whitening teeth toothbrushes are suitable for those people who are accustomed to hard toothbrushes; And if you have tea stains on your teeth, this toothbrush is suitable for you; And in order to protect your gums, please use less strength when you clean your teeth with these hard toothbrushes, and you will also get nice clean effects; And you also can use these brushes to clean some corners of your home. Longer bristles: the thickness of the bristle is approx. 1.3 cm/ 0.5 inch and the height of bristle is approx. 4.2 cm/ 1.7 inch, which is thicker and longer; That's to say, these manual toothbrushes are available to get between tight spaces and hard to reach areas which have a good effect on cleaning tooth stain. Classic colors: there are 4 different colors for you to choose, including blue, red, pink, yellow; You can choose the color according to your favor; And 4 different colors are easy to distinguish which avoid taking the wrong tooth when your family share these huge head toothbrushes set together. Reliable material: the bristles of these extra firm toothbrushes are made of quality nylon material, which is harder and firmer, stable in structure and not easy to deform; These brushes will serve you for a long time. Package includes: you will get 8 pieces extra hard toothbrushes in 4 different colors, each color has 2 pieces; This quantity is sufficient and convenient for you to share with your friends, your family, your guests and so on.