The yarn must be of man-made textile material, measure 67 decitex or more, and have no cross-sectional dimension exceeding 1 mm. Strip must be not more than 5 mm wide. Yarn or strip that falls outside these specifications — for example, a coarser metallic cord — would need to be evaluated under other headings, and a binding ruling may be warranted for borderline dimensions.

No — heading 5605 explicitly covers metallized yarn 'whether or not gimped,' so both gimped and ungimped versions fall under the same heading (560500). The gimping process (wrapping with another yarn) does not change the classification as long as the dimensional criteria are met.