The BCW Current Comic 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 along with current comic bags to protect and store your collectible comics. Certified Acid Free – Independent Lab Tested. Use with BCW Current Poly Mylar Bags. 100 boards per pack. Due to supply chain interruptions the comic board you receive may vary slightly. BCW will continue to supply you with 24 point, acid free board to protect your comics. Dimensions: 6 3/4″ X 10 1/2″.