eqliivalence ( 1986 ) Description ( 1986 ) pieces / kg g / piece (1) (2) (3) (4) (5 ) (6) (7) 1 55.05 55.05-13 , 19 , 21 , 5204.11 , 19 Cotton yarn , not put up for retail sale 25,27,29,33,35 , 5205.11 , 12 , 13 , 37,41,45,46,48 , 14,15,21,22,23 , 51,53,55,57,61 ,