BCW Golden Age Comic Book Backing Boards 100ct.-- The BCW Golden Age Backer Boards are made from 24 point solid bleached sulfate, coated and buffered on one side with 3% calcium carbonate , and are precision cut to size. Use this item to protect and store your collectible golden comics. - Certified Acid Free - Independent Lab Tested - Use with BCW Golden Poly & Mylar Bags Dimensions: 7 1/2 X 10 1/2