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: 5510

Commodity Code Description
Section 11 : Textiles and textiles articles
   Chapter 55 : Man-made staple fibres
     Heading 5510 : Yarn of artificial staple fibres, not put up for retail sale
551011 Single yarn, with >=85% artificial staple fibres, nprs
551012 Multiple or cabled yarn, with >=85% artificial staple fibres, nprs
551020 Yarn, with <85% artificial staple fibres, mixed with wool..., nprs
551030 Yarn, with <85% artificial staple fibres, mixed with cotton, nprs
551090 Yarn, with <85% artificial staple fibres, nes, nprs