I order mine from Grizzly. They have two types and I have the ones that have the black rings on them. These tubes come in various sizes and last forever! Too bad they don't come large enough for a ferruppy to run through. http://www.grizzly.com/products/searchresults.aspx?q=clear%20hose tle www.ferretfamilyservices.org [Posted in FML 6374]