This product is a refined preparation of aquarium carbon dioxide. Glass material, practical and safe. Using high light transmission glass, compact and beautiful. With a suction cup, it is easy to install and use, does not take up space, can greatly increase the dissolution rate of CO2, and the diffusion efficiency is high. Features -Color: Transparent. -Material: Glass. -Size: About 11.50X4.30X2.50cm/4.52X1.69X0.98inch. -It is in stable characteristics, high performance and it is in great reliability, simple, easy to install. -Bringing air CO2 bubbles by water flow to aquatic plants for easy absorption. -It is made with professional technology to ensure the of the product and can work for a long time. -CO2 diffuser can create rich CO2 to provide aquarium plants with the carbon dioxide they need. -With suction cup, taking less space while easy to install firmly. Professional and practical. Package list: 1 x set of aquarium with suction cup