Aquarium CO2 Atomizer Fish Tank Control Water Atomizer Reactor Solenoid Regulator CO2 System Diffuser Aquarium Accessories Description: - 100% brand new and high quality - Easy for installation - Excellent CO2 dissolve rate - Provide elegant look for your fish tank - Suitable for water pipes with an inner diameter of 4mm Specifications: - Type: Carbon Dioxide Refiner - Material:Aluminum Alloy - Length: 60mm - Refine Diameter: 24mm - Color: Silver / Purple / Blue Package Included: 1 * Carbon Dioxide Refiner 1 * Sucker (OR 1 * CO2 Refinement) Notes: --Due to the difference between different monitors, the picture may not reflect the actual color of the product. --Please leaving a message before you give the bad feedback, if the products have some problems. --Please allow 1-2cm error due to manual measurement. --Thanks for your understanding.