Penn-Plax® Deluxe Silicone Tubing is perfect for all your aquarium airline needs. This tubing is made frrom a silicone material that starts out flexible & soft and stays that way! The silicone material stands up to the harshest environments and will not crack or become brittle over time. Super soft & flexible, this tubing resists kinking and is safe for both fresh & salt water environments. The light blue color blends in with most environements and the tubing is free from any markings making it easy to hide. Ideal for aquariums & for applications where flexibility & durability are a must. The convenient roll makes dispensing easy and comes safety sealed to insure your tubing arrives clean.