furnishing articles , of wool , of cotton or of man-made textile fibres 41 ex 51.01 Yarn of man-made fibres (continuous ), not put A up for retail sale : A. Yarn of synthetic textile fibres : 51.01-05 , 06 , 07 , 08 , 09 , Yarn of synthetic textile fibres ( continuous ), 10,12,20,22,24,27,29 , not put up for retail sale , other than 30 , 35 , 36 , 37 , 39 , 40 , non-textured single yarn untwisted or with a 45 twist of not more than 50 turns per metre 42 ex 51.01 Yarn of man-made fibres ( continuous ), not put B up for retail sale: B. Yarn of regenerated textile fibres : 51.01-50,61,67,68,71 , Yarn of regenerated textile fibres 77 , 78 , 80 ( continuous ), not put up for retail sale , other