Material: Pool pumice tile removers are made of odorless and pumice and other abrasive material that not absorb the grease and gunk. Effective Helper: Swimming pool tile cleaners are effective helper to remove rust, mineral buildup, , calcium, stains and hard water deposits from your tiles that readying for summer swimming. Wide Application: The pumice stones are not only for pool cleaning but also kitchen, barbecue, and even the toilet cleaning. Safe for people, animals, plants and water while strong and reliable, fine and solid for long time using. Just wet the stick and wet what you are cleaning, it not leave any scratches.