This tube is large and sturdy, and can be hung from the cage or attached to the sides. My rats were nervous to use it at first but now love running through and over it. It's very easy to clean as the ends pop off and the tube splits in half, and it's equally easy to reassemble. Would definitely recommend.
I've had one of these through a succession of lady rats more than 3 years and so far unchewed. Nicer than the opaque style ones, as you can see what they are getting up to and who is pinching whose food or being groomed. Really easy to take apart to clean too. Has internal ridges for grip if you put it on a bit of a slope and can rats sit on top of it too.