20Pcs 4Mm Aquarium Fish Tank Adjust Air Line Tubing Volume Flow Control Valves Best Quality

Product Description Caliber of matched water hose: 4mm This product is oxygen air pump control valve. Simply designed air valves are easy to use. Sophisticated technology, accurate controlling. Material:Plastic Diameter:3.5cm(approx) Color: Blue and Black Quantity:1set Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! packing: 20 pcs 4mm Aquarium Fish Tank Adjust Air Line Tubing Volume Flow Control Valves The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.