This sheet protector will keep your important documents completely secure within binder rings. Document sleeves feature a heavyweight construction to protect your frequently referenced papers from wear-and-tear. Acid-free archival-safe polypropylene maintains its clarity for long-lasting organization. Nonstick coating prevents ink from smudging or rubbing off papers onto the sheet protector. Top-loading sheet protectors are designed to hold letter-size papers. • Clear. • 3.3 mil thickness. • 50 sheet protectors per box. • Acid free archival safe polypropylene material. • Nonstick coating prevents ink from smudging or rubbing off papers onto sheet protector. • Top-loading polypropylene document sleeve protects frequently referenced papers from wear and tear. • Sold as 50/Box.