1. High Density Carborundum Sponge - The inner layer is a high density sponge, the outer layer of emery process, good toughness and not easy to broke. 2. Easy to Use - Wet the pot and sponge before using it, It can easily clean up rust and oil stain on pot bottom to make it become newer than before. 3.More Flexible and Effective. Remove dirt,rust easily, it wont hurt your hands. Can be used to brush pans, kettles, wipe chopping board, Tires and some another kitchen utensils. 4. Carborundum Sponge - A compound of silicon and carbon which occurs in nature as the extremely rare mineral moissanite. It can ensure you spend less time scrubbing and cleaning since it will do most of the work for you. 5. Proper Size - 3.9 x 2.8 x 1 Inch ( 10 x 7 x 2.5cm ), it is a necessary for your daily life, makes Kitchen, Bathroom cleaning faster and easier.