Pendaflex Legal Expanding File - 5 1/4" Folder Capacity - 8 1/2" x 14" - 5 1/4" Expansion - Plastic - Black - 1 Each Expanding file features super-strong plastic construction that resists abrasion and moisture. Plastic construction is 20 times stronger than paper. Expanding file with a single pocket expands to approximately 5-1/4" and includes alphabetical and blank index tabs to customize contents.