HIGH QUALITY MATERIALS: Aquarium CO2 Air Diffuser. The main body is made of high quality glass, acid and alkali resistant, no immersion corrosion, high transparency, curved glass connecting pipe, small volume PROFESSIONAL WORKMANSHIP: aquarium co2 diffuser. Professional manufacturing, fine workmanship, suitable for small water plant tanks EASY TO USE: Aquarium CO2 Diffuser. Specially designed for the water tank, does not take up space HIGH DIFFUSION EFFICIENCY: Can greatly improve the dissolving rate of carbon dioxide, the diffusion efficiency is high CO2 DIFFUSER USE INSTRUCTIONS: The refiner is placed at the bottom of the tank to enhance the dissolving effect Feature:1. Professional manufacturing, fine workmanship, suitable for small water factory tanks.2. Specially designed for the water tank, does not take up space.3. Can greatly improve the dissolving rate of carbon dioxide, diffusion efficiency is high.4. The main body is made of high quality glass, acid and alkali resistant, no immersion corrosion, high transparency, curved glass connecting pipe, small volume.5. Instructions for use: The refiner is placed at the bottom of the tank to improve the dissolving effect.Specification: Condition: 100% Brand NewItem Type: Aquarium RefinerModel: AP-028Material: GlassColor: Transparent a>Weight: Approx . 17gSize: about 20 x 23 x 63mm/0.79 x 0.91 x 2.48inch Package List: 1 x Aquarium Refiner 1 x Suction Cup Note: During installation, do not exercise too much, it is recommended to use a soft hose to avoid damage to the refiner.