Partition folders keep related records in one place with 20 point gray Pressboard inner partitions, Inside front and back covers have LessSpace fasteners, and inner partitions have dual fasteners, Each folder is bound and gusseted with reinforced Tyvek tape for extra strength and a 1"" expansion, SFI Certified folders are made from acid-free heavyweight 25 point, Type II blue Pressboard, and contain 30 percent post-consumer material, SKU: SPRCH23778