Bantex A4 Insert Binder 3D Ring 25mm Black Box of 25

A 25mm ring binder typically holds around 250 sheets of standard 80gsm A4 paper. Actual capacity may vary slightly depending on paper weight and document thickness, but the 25mm size suits most general filing and reference binder needs.

A 3D ring mechanism uses three evenly spaced rings that close in a smooth, aligned action. This keeps pages flatter and more evenly distributed compared to a 2-ring mechanism, and it allows sheets to turn more freely than in a 4-ring binder. The result is less page curl and easier access to documents throughout the binder.

Yes. The front, back and spine all have a clear overlay that accepts a printed insert, so you can personalise each binder with a custom cover sheet or spine label. This makes them a practical choice for branded training manuals, client reports or student workbooks.

This listing is for a box of 25 binders. The price shown covers the full box, making it a cost-effective option for offices and schools that need to stock up on consistent black A4 binders in one order.

The polypropylene cover is moisture-resistant and durable enough for ongoing office use, and the 3D ring mechanism keeps documents aligned over time. For permanent legal or archival storage, consider pairing these with archival-quality paper and using a sealed storage environment.

These binders are designed for standard A4 paper (210mm x 297mm). They are not suited to foolscap, A3 or other non-standard sheet sizes. All rings are spaced to the Australian standard A4 2-hole and 4-hole punch pattern.

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.

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.