Colby 155B4 clear B4 poly string envelope with the string and button flap, Poly String Envelope header card and an Inter-Office Envelope memo sheet
Colby 155B4 clear B4 poly string envelope with the string and button flap, Poly String Envelope header card and an Inter-Office Envelope memo sheet
Colby

Colby 155B4 Polystring Envelope B4 30mm Gusset Clear Pack of 12

Regular price
$60.83
Sale price
$60.83
Regular price
RRP $68.20
Or 4 payments of $15.21 with
Add items to a quote for bulk pricing, approvals, or purchase orders.

SKU: CO155B4-CLEAR

UPC: 9314486004942

MPN: 155B4-CLEAR

A Re-Useable B4 String Tie Envelope for Internal Mail

The Colby 155B4 Poly String Envelope in clear is a re-useable B4 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 B4 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.

  • Top opening flap secured by poly string and button closure, per Colby
  • Ultrasonically welded for greater strength
  • Gussetted to expand for thicker sets of papers
  • Archival quality polypropylene that is copy safe, acid free and anti-static treated
  • Supplied with an A4 Inter Office Memo sheet, as listed by Colby
  • Clear colour, as shown in our photograph
  • Internal mail between departments
  • Circulating papers for sign-off
  • Storing artwork and photographs
  • Archival storage of documents and film

Shipping

Shipping is kept simple with flat rates for selected areas and free shipping where applicable. Large, bulky, rural or out-of-area orders may require additional freight, and our team will contact you if this applies. For a more specific estimate, simply add this product to a quote or visit our shipping page.

Delivery Times

Melbourne, Sydney, Brisbane, Adelaide — 1 to 3 business days
Perth — 1 to 5 business days
Regional & Outer Areas — 3 to 7 business days

Returns

If you have questions about returns, please contact us or visit our returns page for full details.

Specifications

Brand: Colby

Brand Owner: Colby Office Products, Australian owned and operated, as stated by Colby

Colby Code: 155B4-CLEAR

Size: B4

Colour: Clear

Closure: Top opening flap with poly string and button

Construction: Ultrasonically welded, gussetted

Gusset: Colby's sheet says it expands to maximum 30cm, see FAQ

Included: A4 Inter Office Memo sheet, as listed by Colby

Material: Archival quality, copy safe, acid free, anti-static treated virgin polypropylene

Colby Packing: 12 per pack, 5 packs per inner carton, 20 packs per outer carton, per Colby's product information sheet

Dimensions: 280mm x 380mm, as listed by Colby

FAQs

Colby's product information sheet says the envelope is gussetted to expand to maximum 30cm, while our product title says 30mm. The two figures do not agree and Colby publishes no other gusset measurement, so we have raised it for review.
Yes. The live Colby listing describes an A4 Inter Office Memo sheet with each envelope.
Colby describes a top opening flap secured by poly string and button closure.
Colby lists it as suitable for archival storage of paper, documents, artwork, photographs, film and data discs.
This listing is a pack of 12, which matches Colby's packing of 12 pieces per pack.

Shipping & Delivery

Delivery time depends on your location, the size of your order, and the shipping option selected at checkout. For in-stock items, standard metro delivery in QLD, NSW and VIC is usually 1 to 7 business days. South Australia, Tasmania, Western Australia and the Northern Territory are generally 3 to 12 business days. Express delivery for eligible parcels under 3kg is usually 1 to 4 business days in QLD, NSW, ACT and VIC. Delivery estimates apply to in-stock items only and may vary due to carrier conditions or delays.

If you need to make a change to your order, please contact our team as soon as possible. Once an order has been processed or dispatched, changes may no longer be possible. You can contact us through our Contact Us page for assistance.

Mega Office Supplies ships orders Australia wide and occasionally internationally. The best avenue would be to contact us so we can customise a specific quote for you. Please note that associated international duties, taxes and levies will be the responsibility of the customer.

Returns, Refunds & Replacements

Mega Office Supplies accepts change-of-mind returns for unopened and unused products within 14 days from the invoice date, provided the item is returned in its original packaging and in resalable condition. Original shipping costs are not refundable, return shipping is the customer’s responsibility, and a restocking fee may apply depending on the product type and supplier. Some items, including electronics, assembled or installed furniture, food, beverages, medicines, custom-made products, and certain bulk or special-order items, are not eligible for return unless required under Australian Consumer Law.

If your order arrives faulty, damaged, or incorrect, please contact Mega Office Supplies as soon as possible. Where required under Australian Consumer Law, a repair, replacement, or refund will be offered. In these cases, Mega Office Supplies will cover reasonable return shipping costs, and photographic evidence may be requested to help process the claim. Items should be reported within a reasonable timeframe after delivery.