PENN-PLAX Standard Airline Tubing for Aquariums – Clear and Flexible – Resists Kinking – Safe for Freshwater and Saltwater Fish Tanks – 8 Feet

• 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 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. For better connection to aquarium accessories, soak both ends in warm water for 30 seconds.
• 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 = 8’ / Inner Diameter = 4 mm / Outer Diameter 5.8 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.

Source reference: https://www.amazon.com/dp/B0002563MM