Feature: 1. The three-way diverter valve can combine 2 air outlets into one channel and also can split 1 air outlet into two channels. 2. The two-way diverter valve divides the pipe into two, and the two ends are reconnected with an air regulating valve, which can control the rotating plug and adjust the size of the air flow. 3. The air pipe is made of high quality plastic, which is not easy to corrode, and is durable, has a long service life. 4. The suction cup can fix the oxygen tube on the aquarium wall, which is clean and beautiful, and the pipe is not easy to float. 5. Small, light and easy to install, it can be installed without further complicated steps, and can be reused, bringing you more convenience. Specifications: Condition: 100% Brand New Item Type: Aquarium Air Pump Accessories Material: Plastic Color: As picture shown Function: Adjust the air volume of the air pump. Application: approx. 4mm/0.16in Air Pipe Instructions: Connect the regulating valve to the middle of the air pipe and adjust the gas quantity by rotating the blue valve Package List: 2 x Water Pipe 2 x Valve regulation 6 x suction cup 2 x air stone 2 x non-return valve 4 x accessories