Explanatory notes
… and tubing of a kind used in drilling for oil or gas : 7306.21 - - Welded, of stainless steel 7306.29 - - Other 7306.30 - Other, welded, of circular … Subheading Explanatory Note. Subheadings 7306.11, 7306.19, 7306.21 and 7306.29 The provisions of the Explanatory Note …