Features: brand new and high quality brand new and high quality Clear Design: The glass CO2 diffuser has high transparency. The see-through glass blends in the environment of aquarium perfecthly, which can create a sense of harmony and unity. Function: Create rich CO2 to provide aquarium plants with the carbon dioxide they need and ensure the nutrition and for health of hydrophytes. The CO2 diffuser will supply aquarium plants a friendly living environment. High Quality & High Performance: The aquarium diffuser can produce fine bubbles that rise slowly and ensure efficient diffusion of carbon dioxide in the aquarium. Practical and Convenient: With the suction cup (included), it is easy to install and operate the CO2 diffuser and can fix on the aquarium firmly. You can also adjust the position easily. Size: Glass cup diameter is about 26 mm/1.02 inches. Specifications: Material: Glass Color: Transparent Glass Cup Diameter: Approx.26mm/1.02in Weight: Approx.20g Package Includes: 1 x Glass CO2 Diffuser 1 x Suction Cup note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!