Hi! I have been on the search for suitable tubes for ferrets that are safe for my super diggers. They have successfully destroyed everything I have previously bought. I ended up going to a big name home improvement store and purchasing an expandable perforated black 25 foot long plastic drainage pipe (they come in other sizes too). After a thorough cleaning our four LOVE it. It was under $20 and they can't dig through it!! However, I also came across www.ferrettower.com in the ferret magazine and they sell an amazing ferret tower and another tube run but they do sell just the clear plastic tube! Worth checking them out to those who are searching! <3 Sarah Mom to Lelu, Stoli, Oscar and Tessa. [Posted in FML 7387]