20 air stones

Features - Color: See image. Material: Sandstone. Dimensions: 2.00 x 2.00 x 3.50 cm. - Made with high-quality materials, this product is practical, durable, and offers a long lifespan. - It improves air circulation to oxygenate the water, which is beneficial to aquatic life. - Lightweight and compact, it is easy to use. Its unique design is both simple and elegant. - It is an excellent way to oxygenate your aquarium, pond, hydroponic system, or water circulation system. - The bubbles are uniform, small, and dense, ensuring good oxygenation.