Material: Pool pumice tile removers are made of odorless and pumice and other abrasive material that not absorb the grease and gunk. Safe for people, animals, plants and water while strong and reliable, fine and solid for long time using. 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. Just wet the stick and wet what you are cleaning, it will not leave any scratches. Colour:Gray Material:Pumice Size: 15x3.5x2.5cm Package Contents: 20x Pools Pumice Stone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.