A glass roving is a collection of parallel strands (assembled or multi-end roving) or parallel filaments (direct or single-end roving) assembled without intentional twist from glass fibre cakes (see hereafter) and usually without a cardboard tube. The glass filaments obtained during the mechanical drawing process and wound under the bushings on flexible cardboard tubes are called “glass fibre cakes”. These cakes of untwisted glass fibres are intermediate products, the further processing and classification of which depend on their filament diameter (in microns) and weight (in tex). Glass fibre cakes with a filament diameter of not more than 14 microns and weighing 300 tex or less are light and thick fibres usually called “textile cakes” and designed to produce yarns and light flexible fabrics. These light and thick fibres are excluded from this subheading (subheading 7019.19).