These air stones are suitable for creating a visually appealing bubble display in your aquarium. The steady stream of bubbles not only enhances the aesthetic appeal of your tank but also helps to improve water quality by increasing oxygen Suitable for both small and large tanks, these air stones are a must-have for any aquarium enthusiast. Features -Color:Grey -Material:Sandstone -Size:3.50X2.00X2.00cm/1.38X0.79X0.79in -Enhanced aeration: ensures efficient oxygen distribution throughout the fish tank, benefiting all aquatic -Promotes healthy environment: improves water quality, creating a healthier living space for fish -Effortless setup: easily attaches to any standard air pump, simplifying the installation process -Suitable for multiple tank sizes: compatible with different fish tank dimensions, meeting diverse requirements - quality: made from robust materials, offering extended durability and reliability Package list: 16 x Air Stone Ball