I am looking for a place to buy the heavy duty see thru tubes for our ferrets. They have some old Marshal tubes, but they are getting fairly worn out. I have seen the heavy duty tubes on some of the towers some people make for their ferrets, I'm just not sure where to get the tubing at a "shelter friendly" price. Anyone knowing the whereabouts of this type of tubing, feel free to email me off list. Thanks! Jim Kennedy, Director Ferret Rescue of Maine A State licensed, 501c3 Non-profit shelter. Donate to shelter ferrets by clicking igive.com/from [Posted in FML 6371]