ASYCUDA
  Online Harmonised Commodities Code database

You can enter a keyword or the first few digits from the commodity code, e.g. enter "book" to view commodities with the word book in the description, or enter"490" to view commodities whose code begins with 490.  Commodity codes can be as general as 1 digit or as specific as 6.

Commodities with Heading Code: 5110

Commodity Code Description
Section 11 : Textiles and textiles articles
   Chapter 51 : Wool, fine and coarse animal hair, horsehair yarn and woven fabric
     Heading 5110 : Yarn of coarse animal hair or of horsehair (incl. gimped horsehair yarn)
511000 Yarn of coarse animal hair or of horsehair (incl. gimped horsehair yarn)