INVISIBOARD® Crystal Clear GOLDENAGE Backing Boards Archival grade PETG material 7-11/16 x 10-3/8" .030" thick Easily view the back of your comics inside their protective sleeve. More durable than traditional cardboard backing boards.
Each backing board comes with a (removable) protective peel sheet on both sides.
Comic shown with INVISIBOARD® backer inside SPPGAR Comic Bag