Pumie® Toilet Bowl Ring Remover. A pumice rubbing stone that rids toilets of rust and lime buildup when chemicals quit. Eliminates stains in seconds while protecting porcelain. Shapes easily to flat or curved surfaces.Rids toilets of rust and lime buildup when chemicals quit.Safe for hands and to use around children and pets.Pumice rubbing stone eliminates stains in seconds while protecting porcelain. Easily cleans flat or curved surfaces. Ready to use, gentle abrasive pumice stone removes lime, rust and stains when chemicals quit. Includes 6 toilet cleaners per case.