Manually control the flow of vital O2 by switching an air pump on or off. Made of 304 Stainless Steel and nickel-plated material, will not get rust easily. Lever valve makes it easy to operate. Control the flow of vital O2 from your pond aerator or aquarium air pump with this handy Air Control Valve. Used for aquarium and aquaculture applications. Air lever valve can be connected to aquarium tubing. Package Include:1 x Air Flow Control Valve