Menards is selling the cheapest version of oxygen barrier tubing available. PEX is manufactured under three categories: a, b, c, with a being the best. Menards sale item is c. That does not mean it is not a good product, but it is not the best. PEX c is not very flexible as is the type a, so it is harder to make short bends. PEX a can cost upwards of $225 for 250 feet (3/4") (PexSupply).