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