From Avalara LandedCost, by the LandedCost Research Team, updated June 1, 2017.
This page provides an overview of the basic import duty rates applied to goods that fall under the classification code 7019191015 in Portugal. This product category is defined to include:
"S-glass yarn of 33 tex or a multiple of 33 tex (? 13%) made from continuous spun-glass filaments with fibres of a diameter of 9 ?m (- 1 ?m / + 1,5 ?m)"