Product review (5 stars): Great for Ferrets!
I bought five of these to link them together to make an awesomely long tunnel for my ferrets.  The tube already comes with a couple of thin white plastic connectors.  Also, the wire was sticking out a bit too much on one of the ends so we just folded them over and they seem to be working out pretty well.  This is definitely cheaper than the ones you buy from pet stores and the quality is just as good.  My ferrets have been scratching at them for a while now and they are holding up so far.