These tubes seemed like a good idea for my storage needs, and so I bought several. I was happy with them for awhile, but then the end caps started sticking to the tubes. This made them awkward to remove, and in some cases, pretty difficult.
Another thing to note about the tubes is the number of spools that it is practical to keep in the tubes is one less than the number that will fit. If you fully load a tube, then the spools at either end will be hidden by the end caps and you won’t be able to see what you have. On the other hand, if you limit the number to less than this, then you will be able to see the spools on either end by letting them slide back and forth.