FLOW disposable tubes and long tips are the best disposable tube on the market and priced at less than others are asking for inferior black plastic tubes. They are made from virgin plastic which means a harder and smoother finish. This means no machine bogging down from the needles rubbing on cheap tubes. The silicon grips are moulded directly to the tube so they won't come loose.
The contour magnum tube and tips flow ink like nothing you have ever used. Try them for yourself and you will never use those black tubes again. For those that prefer the feel and weight of a steel grip try the long tips, use once and throw away , just simply clean your grips!