A very popular storage and display system for stamp, covers, minisheets, postal history and much more besides. Stamp stocksheets can be broken down into tseveral different categories, card backed or plastic pages. Card backed pages have clear polyester foil strips affixed to neutral black card pages, pages can be single or double sided. The alternatives are either the PVC plactic pages, again safe for storing many items, pages usually have welded pockets which are sealed on three sides, or the Polyprotect Multi Master system which are again sealed on three sides pockets.