Pratt MJ-4 Self-Seal Stay Flat Mailer, White, 9.75" x 12 1/4" (Pack of 100) Strong, rigid paperboard mailers made with high quality recycled materials Durable mailer protects items, such as documents, photos, and CDs, while enhancing your corporate image Recycled content makes a positive contribution to environmental concerns 100% Recyclable Pressure-sensitive, self-sealing adhesive closure; reliable and tamper-evident Release liner peels off quickly and easily Clean white material for a clean, professional look.