Description: The nut lock tooth design can safely lock the air tube. It has dual suction cup and is easy to install, which needs to be used with aquatic meters with a working pressure of 2kg/cm2 or above. With precision ceramic tubes, the atomizer can fully dissolve CO2 in water so that it can be absorbed and used by water plants. Made of high quality plastic material, the atomizer is eco-friendly and durable. There are two different sizes for you to choose: S, L. It is suitable for various fish tank, and fit for home use, aquarium, seafood farming, etc. Item Name: Aquarium Atomizer Material: Plastic Features: Solid, Anti-Scratch, Effective Size Details: S: 5.3cm x 3.2cm x 2.3cm/2.09'' x 1.26'' x 0.91" (Approx.) L: 5.5cm x 4cm x 3.5cm/2.17'' x 1.57'' x 1.38" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Precautions: 1. Because the required working pressure is relatively large, when adjusting the air volume, the pressure should be increased from small to large and the fine-tuning switch should be adjusted from small to large. Be sure to be slow and slow. 2. If suddenly and quickly pressurize or increase the air volume, it is very likely that the atomization will break. 3. This product is suitable for use in aquariums within 40-120cm. 4. Do not use for children to play, so as not to cause injury and loss. 5. Self-made bio-generating carbon dioxide equipment cannot reach the pressure required for the work of this product, so this product can not be used. Package Includes: 1 x Aquarium Atomizer