Check the listing for details. Graded Comic Mylar Archivals - 25 Ct. Condition: New. Listed at 22.44 USD. 1 Pack of 25 Graded Comic Book 2 Mil Mylar Bags Fit silver age, modern and regular comic bags Coated on one side Buffered with 3% calcium carbonate.Fits CGC Graded Comic Books Backing Boards are Certified Acid Free - Independent Lab Tested Bags are 2 mil material thickness polypropylene - Crystal clear Protect comics while handling.Use with BCW Silver Poly & Mylar Bags to protect and store your collectible silver and bronze age comics. Solid bleached sulfate, coated and buffered on one side with calcium carbonate.Strength is 10 times that of polyethylene . It means these bags feature incredible crystal clear optical clarity, and are specifically designed to not easily rip, tear,Exterior Dimensions: 9 x 14 1/4 1 1/2 inch flap for closure .It will safely store your treasured comic books or other memorabilia in a protective crystal clear These 2 mil Comic Book Bags are made of Archival Polyester (Mylar) an inert material of the highest clarity. Mylar will not discolor, damage, or adhere to items placed inside it. It is a sturdy film that beautifully displays, timelessly protects and gives extra support to fragile documents. Resistance to moisture, insect attack, fungus, mold, mildew, acid, oils, grease, and solvents. Mylar contains no dangerous plasticizers, slip additives, surface coatings, antioxidants, acid-hydrolysis.