Oxygen pump can be used in separate cylinder, which can be matched with oxygen pipe valve for better performance. Suitable for all kinds of air pump to increase the air supply capacity of equipment or other purposes. Connect 4MM diameter pipe, create healthy environment for your fish. Easy to connect hose, wonderful and practical aquarium accessory. High quality plastic material manufacturing ensuring maximum durability., Weight: 0.0220462262 Pounds, Manufacturer: Candeon