Half Back acid-free backing boards offer premium protection for your collectible items. Crafted from 100% acid-free, 24-mil thick cardboard, these boards deliver superior rigidity and durability. Each board is manufactured with a 3% alkaline buffer and maintains a pH level of 8.0+ to safeguard against deterioration, meeting strict U.S. Government archival storage standards for long-term preservation. Key Features: 100% Acid-Free Backing Boards to prevent aging and degradation. 3% Alkaline Buffer for enhanced protection. Maintains a pH level of 8.0+ to ensure long-lasting preservation. Complies with U.S. Government archival standards for storage. Specifications: Pack Size: 100 boards Dimensions: 7-1/2” x 10-1/2” Thickness: 24-mil cardboard MYLITES 2 Protective Sleeves: Each pack contains 50 protective sleeves for silver and gold-age comic books (measuring 7-3/4" x 10-1/2" with an additional 1-1/2" flap). These sleeves are made from Mylar, the most stable plastic with zero off-gassing, offering unbeatable durability. Unlike poly bags, Mylar does not absorb moisture and provides 100 times more resistance to oxygen diffusion. Used by the National Archives and the Library of Congress, Mylar ensures unmatched preservation for your collectibles. It is 1/3 the strength of steel, providing robust protection against: Key Features: Humidity and moisture Breakdown of poly bags Acid migration Oxygen exposure UV light-induced fading Mold, mildew, and insect damage Oils and grease Specifications: Pack Size: 100 sleeves (2 packs of 50) Dimensions: 7-3/4" x 10-1/2" with 1-1/2" flap Thickness: 2-mil Mylar Note: This listing includes 100 Half-Back Silver/Gold Backing Boards (1 pack of 100) and 100 Mylites 2 Silver/Gold Mylar Sleeves (2 packs of 50) conveniently combined for cost-e

100 Mylites2 Silver/Gold Mylar Sleeves & Half Back 24pt Boards E. Gerber