INVISIBOARD® Crystal Clear NATIONAL GEOGRAPHIC Backing Boards Archival grade PETG material. 7-1/16 x 10" .030" thick Easily view the back of your magazines inside their protective sleeve. Semi-rigid. More durable than traditional cardboard backing boards.
Each backing board comes with a (removable) protective peel sheet on both sides.
NOTE: Use the sleeves listed in related products with this backing.National Geographic Sleeves -SNG3 & SPPNGRR will not hold a National Geographic with a backing board.