Closed on 3 sides to keep contents secure, your odd-sized sheets, discs and stray photographs won’t end up floating loose at the bottom of the file drawer. Sides expand 1-1/2" to store up to 300 sheet. These manila jackets have full-height sides and a reinforced straight-cut tab for durability. A thumb-cut front panel makes it easy to reach what you need. Letter Size. 1-1/2" Expansion. Straight-Cut Tab. Manila. 50 Per Box. The Perfect Project File: Penda flex file jackets provide easy, open-top access to the odd-size papers, discs and media you gather for big projects. Full-height sides keep all of your elements protected. Room to grow: Side panels expand 1-1/2" to hold up to 300 pages as your files mature. A Practical, Portable Solution: Enclosed folders keep papers secure through meetings and travel. You'll arrive prepared with all of your pages intact. Thumb-Cut for Convenience: A handy notch on the front panel lets you thumb through contents for the pages you need. In Tried and True Manila: Economical manila folders fit into many existing filing systems. They're easy to label, easy to read and easy to replace. Stock Up Shop: Boxes of 50 folders keep you ready for incoming assignments.