2"" Accordion Expansion Antimicrobial File Wallet, Legal, Four Colors, 4/Pack, Sold as 4 Each Expanding file wallet with antimicrobial agent features flap with elastic cord and expands up to 2"". Treated to resist the growth of bacteria, mold and mildew that can cause stains, odors and product deterioration. Bright colored wallets help color-code projects. Flap with elastic cord provides security.