Such sets or assortments of any material (agglomerated cork, leather, rubber, textiles, paperboard, asbestos, etc.) are classified here when put up in pouches, envelopes, boxes, etc., provided that the gaskets or joints are not all of the same material.
To be classified here, the sets and assortments must contain at least two gaskets or joints of different material. Therefore a pouch, envelope, box, etc., containing, for example, five gaskets all made of paperboard, is not covered by the heading but is classified in heading 48.23; but if the set also included a rubber gasket it would fall in this heading.