describe:Environmentally friendly materialsThese BBQ stove stones are made of foam glass material, which is odorless and non-toxic, does not absorb fat and sticky substances, and is safe for people, animals, plants and water.shaveIt won't scratch your tiles and metal, this cleaning tile is your safe solution.actualPumice stone is used to remove grease, stains, residue and grime from BBQ scabs.easy to handleBarbecue Tile is a lightweight pumice tile with a natural non-slip surface that makes cleaning feel like a walk in the park without anything getting in the way.EffectivelyCleaning your grill is easier and more thorough than a brush, you can blow off dust particles or wipe them with a damp paper towel.Material: foam glasscolor: graySize: 10 * 7 * 4cm / 3.93 * 2.75 * 1.57 inches (L*W*H)Package includes: 4PCSnotes1. Please allow a slight deviation in measurement.2. Due to the difference in light and screen, the color of the product may be slightly different from the picture, thank you for your understanding.