2 mil polypropylene comic bags and 22pt acid free boards in current and silver age sizes. Great valueComic Concept products. The bags are available in
BCW Supplies - Current Size Comic Boards - White
Manga Bags: A Guide to Bagging Manga : r/MangaCollectors
BCW Short Comic Bin - Plastic - Black : Office Products
Batman Comics, Graphic Novels & TPBs for sale
Fits most Silver Age comic books 1 1/2 flap for closure Acid free, archival safe No PVC Use with BCW Silver Age Backing Boards Dimensions: 7 1/8 X 10
BCW Comic Bags, Silver 7 1/8 X10 1/2 + 1 1/2 Flap 2 mil Polypropylene (100 ct)
Comic Bag Board
Batman Comics, Graphic Novels & TPBs for sale
100) Current Size Ultra Clear Comic Book Bags and Boards - by Max
Fits Current Comic Boards, Dimensions 6.75 Inches x 10.5 Inches Use with BCW Current Poly and Mylar Bags Precision Cut, Coated On One Side Certified
BCW Supplies - Current Size Comic Boards - White - BBCUR - (100 Boards)
25-PACK OF CRYSTAL-CLEAR Comic Clear Backing Boards - Silver Age Size £28.40 - PicClick UK