secondo me si intende questo

A Presentation Pack typically contains a full set of a new stamp issue, produced for philatelists and stamp collectors. It normally comprises a folded card containing detailed notes about the stamps, ***a card with clear strips for holding the actual stamps***, all held within a clear sleeve. The packs are usually sold at a price a little above the stamps' face value.
https://en.wikipedia.org/wiki/Presentation_pack

Straordinariamenti robusti, sono stati espressamente ideali per accogliere i nostri **cartoncini con taschina portafrancobolli**.
Con fondo bianco e pellicola superiore perfettamente trasparente, i fogli possono contenere fino ad 8 cartoncini per lato
http://www.safe-italia.com/tutti-per-francobolli/fogli-suppl...