RAN Aquarium Glass CO2 Diffuser Bubble Air Stone Purge Oxygen Aeration

Features: Suitable for use as a decoration or provides a good source of aeration for the tank or aquarium Specification: Material: Glass Length: 13cm Diameter: 4.5cm Quantity: 1 Set Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-3cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!