Practical Oxygen tube for use with most regulators. Green color makes these tubes easier to see, helps to avoid . The crush and memory-resistant tubing are great for use while sleeping because you don't have to worry about restricting your oxygen flow, very safe and convenient for use. size:2m Material:plastic colour:(White / green) random color Note: Random color, don't accept the specified color Package Contents: 15 * hose Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.