Hyptube made from nitinol for medical purposes. TINOL (NICKEL-TITANIUM) IS WIDELY USED AS A "SELF-EXPANDING STENT". IT IS ALSO KNOWN AS A "METAL WITH MEMORY". IT CAN BE HEAT TREATED (TAUGHT) TO BE A PARTICULAR SHAPE AT A PARTICULAR TEMPERATURE. THE TUBES MUST MEET EXACTING SPECIFICATIONS WHICH ARE SET BY THE COMPANY'S CUSTOMERS. THEY ARE OFTEN USED AS AN IMPLANTABLE DEVICES. THE REQUIREMENTS FOR THESE (IMPLANTED MATERIALS) ARE SUBSTANTIALLY HIGHER AND ARE NORMALLY PURCHASED FROM VENDORS THAT HAVE BEEN IDENTIFIED AND VALIDATED BY THE CUSTOMER.

GENERAL INTERPREATIVE RULES 1 & 6 SECTION AND CHAPTER NOTES TO SECTION XV & CHAPTER 75 TEST TO CODES 7507, 75071200