Made of Archival Polyester (Mylar) Fits Graded Comic Books 4 mil material thickness
Exterior Dimensions: 9 x 14 1/2 There is no flap on these sleeves.

These 4 mil Comic Book Sleeves 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. Mylar contains no dangerous plasticizers, slip additives, surface coatings, antioxidants, acid-hydrolysis.