Tube Die Material Steel Conduit/Tubing Size - Maximum 3 in Conduit/Tubing Size - Minimum 1 in Accessory Type Round Tubing Die Features 304 316 and 321 Stainless can be Bent. Must Check for Other Grades of Stainless Certain Tempered Aluminum Alloys are Not Bendable. it is the Customer s Responsibility to Ensure from Their Metal Supplier that the Aluminum Tube Supplied is Formable for Bending Dom Mild Steel or Chromoly Includes Follower and Retaining Strap Main Die