Features: Efficiently atomizes carbon dioxide for aquariums with the co2 diffuser, ensuring healthy plant growth. Durablity metal material, this diffuser provide fine co2 bubble with minimal pressure requirements. Perfect for enthusiasts who like water plant and desire a stable environment for their water. Suitable for various environment like office small aquariums, createing a conducive space for plant growth. Enjoy consistent co2 diffuser and a thriveing water environment with this reliable diffuser. Specifications: Material: Metal Size: 1.2x11.2cm/ 0.47x4.41in, 1.6x12.9cm/ 0.63x5.08in Type: 2, 1, 3 Package Includes: 1pc Carbon Dioxide Diffuser note: 1: Please allow 1-2cm errors due to manual measurement, make sure that you not mind before your order. 2: Due to the differences between different monitors, the picture may not reflect the item's actual color.