【High Quality Material】Our CO2 check valve adopts stainless steel spring inside, which has good anti-reaction and corrosion resistance. ABS plastic material, sturdy and durable, you can use it with confidence. 【Operation method】Our carbon dioxide check valve is easy to install, just remove the lock nut and insert the nut into the trachea. Confirm the direction of the incoming and outgoing air, and insert the air duct. Tighten the lock nut. 【Explosion-proof check valve】Our CO2 check valve has airway blocking function to prevent bursting and effectively protect your beloved fish. Low drag design for air motors and CO2 control systems. 【Easy to Clean】Our CO2 check valve has a very beautiful streamline design, combined design, removable and washable, and the plastic material is easy to clean. 【Quality Assurance】Strict quality inspection is carried out in every link in the manufacturing process. If you have any questions about our products, please contact us. We will be happy to answer