Shipped wrong item
As others have posted here, this vendor shipped the grey stiff tubing, not the white flexible performance tubing. Their initial email reply was terse, ending with "Check the label its made by Respironics." The issue is not who manufactured it, but that it's the non-performance tubing. They claim they are refunding my my money, but have not offered to replace with what they are supposed to be selling. The tube is good, but buy elsewhere - Amazon, don't deal with this guy.
Rating: 1 stars