50' Oxygen Tubing (kink-Free) Cs/20 Kink resistant six channel inner lumen design * Available in two durometer options: 75 shore (clear) and 85 shore (green) 75 durometer tubing is soft flexible tubing that remains straight when uncoiled due to no memory design * 85 durometer tubing inhibits twisting of the tubing which sometimes occurs in longer lengths due to patient movement *