Columbian CO490 9x12-Inch Clasp Manila Envelopes, 100 Count A durable MULTI-PURPOSE envelope. Dual purpose seal allows for multiple uses. Use the moisture activated gummed seal for mailing or the strong metal clasp for repeated use and storage purposes. EXTRA heavy-duty opaque 32lb manila material provides privacy of contents. Open end closure. 9" x 12" 100 envelopes A durable MULTI-PURPOSE envelope. Dual purpose seal allows for multiple uses. Use the moisture activated gummed seal for mailing or the strong metal clasp for repeated use and storage purposes. EXTRA heavy-duty opaque 32lb manila material provides privacy of contents. A durable MULTI-PURPOSE envelope. Dual purpose seal allows for multiple uses. Open end closure. 9 x 12 Inches. 100 envelopes Use the moisture activated gummed seal for mailing or the strong metal clasp for repeated use and storage purposes.