My client relies on supplemental oxygen, and is also a wheelchair user. Her apartment is 35 feet in length from the machine. Oxygen hoses are either 25 feet, ten feet too short to reach the door, or 50 feet, with fifteen feet of tubing to get rolled over, kinked, damaged! She was going through one or two hoses a month! Costly! THESE are a length that is both manageable and economical!Also they are kink and split resistant! As the person responsible for keeping her equipment in working order, I will say this tubing is a Godsend! THANK YOU!