Features: bubble stone,Bended Air Stone,Right Angles Air Stone，Acrylic air stone，Bubble Stone，Fish Tank Bubble Stone,aquarium air stone,Oxygen Stone, anti-blocking sand head，Essential Tool for Maintaining Fish Health, increases oxygen level and is easy to use. Durable Materials and Simple Design: Made with acrylic and coppers, this bubble stone is builts to last and simple to set-up. efficient oxygenation is perfect for maintaining healthy oxygen level in your aquarium. Connect bubble stone to air pump and watch as it create a beautiful flow of bubble, enhancing the visual appeal of your aquarium. Specifications: Material:acrylic+copper Size:approx.3.5cm/1.38in Color:white Package Includes: 1xAquarium Air Stone note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color of the item.