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HS code 6115.30.10.00 (Chapter 61 "Apparel, knitted or crocheted"; Heading 6115 "Panty hose, tights, stockings, socks and other hosiery, including graduated compression hosiery (for example, stockings for varicose veins) and footwear without applied soles, knitted or crocheted"; Subheading 611530 "Other women's full-length or knee-length hosiery, measuring per single yarn less than 67 decitex") under the United States tariff schedule classifies "Containing 70 percent or more by weight of silk or silk waste". United States customs apply MFN rate of 2.7%, Column 2 rate 90%. Statutory unit of measure: doz. prs.","kg. 15 free trade agreement preferential rates are available for this code.