Number of layers (specification):

Single piece-width 30 * depth 46CM (nail-free stickers * 4)

Single piece-width 50 * depth 46CM (nail-free stickers * 4)

Double-piece-30-56cm wide telescopic (nail-free stickers * 4)

Double sheet-width 50-76cm telescopic (nail free * 4)

Double-piece-50-96cm wide telescopic (nail-free stickers * 4)

Single piece-width 30 * depth 46CM (with sliding guide rail)

Single piece-width 50 * depth 46CM (with sliding guide rail)

Double-piece-30-56cm wide telescopic (with sliding guide rail)

Double-width 50-76cm telescopic (with sliding guide rail)

Double-width 50-96cm telescopic (with sliding guide rail)