Colby 155A Polystring Envelope A4 30mm Gusset Clear

A Re-Useable C4 String Tie Envelope for Internal Mail

The Colby 155A Poly String Envelope in clear is a re-useable C4 envelope with a string and button closure, for offices circulating papers, artwork and photographs between staff.

Colby’s product information sheet describes a tough, high quality C4 envelope in polypropylene with a top opening flap secured by poly string and button closure. The envelopes are ultrasonically welded for strength and gussetted to expand, and Colby lists the polypropylene as archival quality, copy safe, acid free and anti-static treated. The live Colby listing adds an A4 Inter Office Memo sheet with each envelope.

The same envelope can go around the office for months, with the memo sheet showing who it goes to next. The string and button keep the flap closed in an internal mail tray, and the gusset leaves room for a thicker set of papers.

For papers that travel by other routes, see our document wallets and expanding files, while document trays hold incoming mail and office archive boxes take envelopes that are finished with.