Give your valued documents dual protection. High-quality polypropylene provides archival safety for your important papers. At the same time, a locking flap-top closure provides envelope-like protection to ensure that valuable pages won't fall out, even if the binder is turned upside-down. LockTop™ keeps out dust and airborne contaminant. Holds 5 to 10 sheets of 8 1/2" x 11" documents or papers. Made of heavyweight, clear 5mil. polypropylene. Measures 9 1/4" x 11 3/8". Sold in packages of 50.