Oversized stock pages, available with clear (C), black (S), or white (W) backing film. Highly transparent, welded pockets provide extra security: all items are fully enclosed - for optimum protection. Pockets come in a large variety of dimensions, making pages suitable for mint sheets, regular or historic postcards. All materials are acid-free and contain no harmful softeners. Suitable black interleaves (ZWL) are available in the same size.