1.MATERIAL: The cleaning sponge inner layer is a density sponge, the outer layer of nano emery process. Good flexibility, durable,removal ability. 2.FUNCTION: Uses for stubborn dirt stains cleaning all kinds of kitchen utensils on the stove, rich crust are good clean stubborn grease rust. Rub the Pot, remove rust, great kitchen helper, suitable for stainless steel, baked messes, glass etc. 3.WIDELY USAGE: You can use it clean kinds of things, like stainless steel, enamel, stoneware, countertops, crystal, glass, wood, chrome etc. 4.EASY TO USE: Wet the pot and sponge before using it, and add some detergent for better effect. It can easily clean up rust and oil stain on pot bottom to make it new. Give you a tidy and clean home environment. 5.It is a necessary Artifact for your daily life, makes Kitchen, Bathroom and Car cleaning faster and easier. Note: It is not recommended for painting surface wares, Non-stick Pan and smooth surfaces to avoid scratching surfaces.