Get a handle on large files. Fasteners let you subdivide materials to better manage projects or customer information. Tear-resistant TyvekÔŅĹ gussets stand up to repeated use and expand as your needs grow. Heavy-duty 25 pt. pressboard delivers strength and durability. Straight tabs. File Folder Type: End Tab Fastener; Size: Letter; Folder Material: 25 pt. Pressboard; Color(s): Green.