Scope of use：Pumice stone is used in toilets to clean calcium deposits, limescale and hard water rings on toilets, sinks, bathroom tiles and other ceramic surfaces. It can also be used to remove rust and grease from grills and ovens. material：Manufactured from recycled material (glass). Will not scratch the toilet or bathtub, and the cleaning process is simple, convenient and effective. Convenient and effective：Pumices tone can polish toilet bowls. Tiny particles can remove dirt through friction. It gradually wears down during use. Two pumice stones will quickly refresh your toilet within a few minutes. It is much cheaper than buying a new toilet. Instructions：Wet the pumice stone first for 15 to 20 seconds, then test in a small area, keep the pumice stone and toilet surface moist throughout use, and then wipe clockwise to easily remove the dirt.