Eliminates the need for hookah foil. Significantly reduces the amount of ash, ultra-fine particles, and chemicals that pass through the tobacco, providing a smoother, cleaner, and more flavorful hookah smoking experience. Extends the life of your hookah smoking session. 9.5 cm diameter, 9.2 cm diameter on the bottom side, works with any size bowl including Khalil Mamoon, MYA, Oblako, MIT and many more. Easy to clean. can be used with quick-lighting hookah coals, natural hookah charcoal with this product.