Hey guys if your making tube jigs I buy alum rods at home depot and then cut them down and bend them at the length I want the tube to be. So if you want a 3" tube i cut the alum rod about 6" that way you can bend the rod and have a handle to dip the tubes. if you want a thicker tube you just dip it more times. the more you dip it the thicker it gets. Just make sure when you are making any plastic baits to have some hot gloves that will keep your hands safe from burns and make sure you have your area with a vented hood or in a very well venilated area as all plastics have fumes and are like anything you use you dont want to breathe the fumes. You only have one set of lungs. hope this info helps and have fun.
love to fish and make soft plastics