As aquarists and fish-keeping hobbyists know, it’s always good to have extra airline tubing on hand. Our Standard 3/16” Airline Tubing offers a great solution for various aquarium airline needs, such as connecting an air pump to an air stone, an under-gravel filter, or an aquarium ornament. Clear, Flexible, and Durable: Made from clear, flexible plastic, our Standard 3/16” Airline Tubing is built to withstand wear and tear. The tubing’s flexibility makes it a breeze to work with. In addition to being resistant to kinking, it’s ultra-durable and should not crack or become brittle. Our tubing fits seamlessly in any home aquarium, and virtually disappears in the water! Safe for Fish: Our Standard 3/16” Airline Tubing is made of fish-safe plastic, and can be used for both freshwater and saltwater tanks. Measurements: Length = 500’ Inner Diameter = 4 mm Outer Diameter = 6 mm