Standard Tubing, Grey 6 ft.
Available from CPAP Supplies Plus/Direct
This type of tubing is the standardized tubing used throughout the CPAP industry. It is smooth-bor, meaning that the interior of the tubing is smooth, making it more quiet and causing less air resistance. Also, the ends of the tubing are made of silicone-rubber, opposed to other, lower quality tubes made with all rubber ends.