As aquarists and fish-keeping hobbyists know, it’s always good to have extra airline tubing on hand. Our Deluxe 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. Flexible & Durable: Made from durable silicone, our Deluxe 3/16” Airline Tubing is built to withstand wear and tear. The tubing’s flexibility makes it a breeze to work with. This tubing will never crack, harden, or kink. The light green hue also virtually disappears when in water. Safe for Fish: Our Standard 3/16” Airline Tubing is made of fish-safe silicone, and can be used for both freshwater and saltwater tanks. Measurements: Length = 200’ Inner Diameter = 4 mm Outer Diameter = 6 mm Shop Penn-Plax for All Your Pet’s Needs: Penn-Plax is a manufacturer and distributor of top quality pet supplies, who specialize in creating excellent pet products for animals, both great and small.