Hypotube manufactured from Elgiloy for medical purposes, can be implanted in the body. Elgiloy is a cobalt based stainless steel containing less than 1.2% carbon and more than 10.5% chromium. The tubes must meet exacting specifications which are set by the company's customers. The tubes are cold rolled with a circular cross section without fittings.

GENERAL INTERPRETATIVE RULES: 1 & 6 THE HARMONISED SYSTEM EXPLANATORY NOTES SECTION XV, CHAPTER 73 & TO HEADING: 7304 TEXT TO CODES 7304, 7304 41 00 90 RE-ISSUE OF 18NT-14-6153-02