High-Quality Instrument Tubes Made of Stainless Steel, Duplex Steel, and Brocade Alloy | Available in Various Sizes (2mm-50mm, 1/16-2) | Ideal for Temperatures Ranging from -198℃ to 537℃ | Pickled, Bright Annealed, or Cold Rolled and Bright Annealed | Outer Surface Mechanically Polished for Superior Performance