This kind of Aquarium Valves allow you to control the water flow entering aquarium. Professional and practical, very convenient. Fish tank adjusting let you operate it easily. Efficient distribution, more convenient. It has two heads to connect different sizes of , which bring a big convenience for you. Make sure enough fresh water for fish. Features -Color:Black -Material:ABS -Size:17.50X4.00X3.00cm/6.88X1.57X1.18in -This kind of Water Regulator is installed at both ends of the filter bucket can quickly distribute water. -Made of good materials and detailed workmanship, safe, practical, durable for long time to use. -Water control valves work for freshwater fish tanks, seawater fish tanks, seafood tanks, and water storage tanks. -With the on this water valves, can adjust the water level widely, bringing you much more convenience. -Great tool for fish tank, with the help of the adjusting valves, you can control the water inflow for the fish tank. Package list: 1 flow valves