There is one Super Sheet in this package. Super Sheets are great for railyards or sidings. This Sheet is 3mm x 12" /SILENT" x 24" /SILENT". Track-Bed requires no pre-soaking like cork does: it remains flexible and won?t dry out or become brittle! It aligns well with cork or Homasote applications. Install Track-Bed with Foam Tack Glue (ST1444). Pin in place with Foam Nails (ST1432).