BASIC NECESSITY FOR AQUARISTS: 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 and fish tank needs, such as connecting an air pump to an air stone, an under-gravel filter, or aquarium décor. CLEAR, FLEXIBLE, AND DURABLE: Made from clear, flexible plastic, our Standard 3/16” Airline Tubing is built to withstand wear and tear. In addition to being resistant to kinking, it’s ultra-durable and should not crack or become brittle. For better connection to aquarium accessories, soak both ends in warm water for 30 seconds. AIRLINE TUBING: allows for air flow and oxygen to run through in one direction preventing water from siphoning and can be used for both freshwater and saltwater tanks. MEASUREMENTS: Our Standard 3/16” Airline Tubing Length = 25’ / 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.