With a high-quality copper carbon dioxide controller, you can set the amount of carbon dioxide accurately and securely. A simple design makes installation virtually easy. With two pressure gauges, you can read the settings and make sure they are as desired. The outlet pressure gauge automatically controls the outlet pressure and stabilizes at 4-6 bars after setting. The blow-off meter prevents reverse flow, which prevents reverse flow, providing better corrosion resistance and longer operation. The time has and can provide optimal carbon dioxide for the plant with plants and grow greatly. The controller has been improved, the bubble counter with acrylic tube is thicker; the controller body is made of copper. Everything is made of bright silver, the design is more refined and easy to install. Main material: Copper silver Interface type: W21.8 Input voltage: 220V Package size: 21.5 * 18.5 * 9cm Package weight: 960g Carbon dioxide controller The CO2 controller allows you to quickly customize the optimal CO2 amount for the aquarium. These two high-performance pressure gauges provide optimal supply to the aquarium. Plants can support photosynthesis and more efficiently. Shop tips: 1. The size is measured manually, please allow the error (1-3 cm). 2. Due to the different monitor pixels, there may be some color difference, please refer to the actual product.