Sunleaves DIY Air Dividers allow gardeners to oxygenate the exactly the way they want! These easy-to-use gadgets simply attach to a length of ¼” tubing, then chain to one another as needed until the desired setup is achieved. Each inline Air Divider can be individually turned on or off by twisting the valve at the top of the unit, and the last divider in the chain seals tight with a provided cap. Each package contains four dividers.