10 x 12 x 1-1/2 Tyvek® Catalog /Open End  Expansion Envelopes  - Zip Stick® 18lb

Perfect for larger bulkier papers, thick bundles, important documents, soft goods and pre-packed items.

• Expandable  to 1-1/2 inches
• Zip Stick Closure ( Peel & Seal) 
• Moisture & Burst resistant
• Lightweight Tyvek is half the weight of a traditional envelope.
• 18lb.paper
• Open End 
• Available in case and pack sizes