Quote Originally Posted by gabe View Post
polyethylene tubing. .. low bend radius .. hard to work with.
I think I'm using polyurethane and it's easy to work with in the sizes I've used (6 x 8 and 8 x 10). They also have fittings available in 45's and 90's if you want to do something peculiar. For instance this would be impossible to do without 90's: