Pumie Toilet Bowl Ring Remover cleans through gentle abrasive action. Rubs out toilet rings in seconds. Rids porcelain bowl of rust and lime build-up. Ready-to-use. Unexcelled for removing stubborn stains and unsightly rings from toilet bowls. Cleans when the strongest acid cleaners fail. Contains no active chemicals or harsh detergents. Shapes easily to flat and curved surfaces. Non-toxic, safe for hands and around children and pets. Safe for the environment. Odor free. Stone size: 5 In. L. x 1-1/4 In. W. x 1-1/4 In. H.