Colby 155B4 Polystring Envelope B4 30mm Clear Archival Wallet

Clear B4 poly envelope with gusset for oversized documents

This B4-format envelope is designed for secure handling of larger documents, featuring a clear cover, 30mm gusset, and string-tie closure. Perfect for forms, reports or artwork that exceeds standard A4 size.

Key Features:

• Clear polypropylene cover with 30mm expanding gusset
• Top opening with anti-static treatment and string-tie flap
• Includes A4 "Inter Office Envelope" insert
• Made from archival quality, copy-safe, acid-free material

Its clear construction makes it ideal for environments requiring immediate content visibility, such as records teams or design departments.