Salter Labs Oxygen Supply Tubing with Safety Channel?? 7Ft 2002-7</br></br>Product Description</br></br>7ft tubing. Special design has three inside channels that help prevent the tubing form becoming occluded. Ideal for home patients where long lengths can cause a potential kinking problem. Available in various lengths. Latex-free. 3/16"I.D.</br><br/>http://www.amazon.com/gp/product/B00EFDPULWW