PREMIUM OXYGEN SUPPLY TUBING Mars Wellness oxygen supply tubing has a three channel inner lumen design providing an uninterrupted flow of oxygen that provides maximum safety for the patient At Mars Wellness we know that quality always comes first. At Mars Wellness we have the ability to be able to provide our customers with the highest quality standards while still keeping our prices reasonable. Here at Mars Wellness we understand that not every customer is the same and that not every customers needs are the same. If for any reason you are unsatisfied with your purchase, please reach out to us right away. * 50 Feet long * Crush and kink resistant * Latex free * Universal tubing works with all major brands * Clear design * CRUSH AND KINK RESISTANT - The crush and memory-resistant tubing are great for use while sleeping because you don't have to worry about restricting your oxygen flow when laying on the tubing.