Pack of 5 16x20 1/32" Chip Board Backings Use chipboard for mounting, backing, book making, and constructing It has a smooth, uncoated surface on both sides It is aprox 1/32" thick Use chipboard for mounting, backing, book making, and constructing. It has a smooth, uncoated surface on both sides. Color varies based on what recycled paper is available from the manufacturer. Not archival. It is aprox 1/32" thick