Danner Supreme pipe air valve is designed to fit in any aquarium. Controls the flow of air and helps pump to operate properly to oxygenate. The brass valve sports a classic look and allows air to pass through tubing. By closing the valve you can limit or completely stop the air flow. You can install a series of these pipe valves and run multiple tanks with one large pump. This pipe valve can be installed to a PVC pipe. This valve is heat resistant and does not easily melt or suffer damage if properly kept and maintained. Made of brass material, a metal alloy that"s a combination of copper and zinc. Connects to standard 3/16 airline tubing.