50 extra-thick paper backing boards -- 20% thicker than the market-leading thick board!
 
Made from virgin pulp and coated with a 5% alkaline buffer, these ultra-rigid, acid-free paper boards give you superior protection to the leading thick boards you have have used before.
 
Quantity: 50
Dimensions: 7" x 10.5"
Thickness: 42pts (20% thicker than the market leading thick-board!)
Archival Properties: Acid-free; 5% calcium carbonate buffer