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12" (300mm) Diameter Cardboard Tube Extension Kits

  • 12" (300mm) Diameter Cardboard Tube Extension Kits
  • Product Code: EXTKIT-12
  • £0.00

FREE SHIPPING on orders over £30 (ex VAT) to Most UK Mainland Addresses
Orders placed after 3.00 pm may not be shipped on the same day

Available Options


Need Extra Long 12" Diameter Cardboard Postal Tubes?


You can easily create your ideal length 12" (300mm) diameter cardboard tubes with our postal tube extension kits.

We can only make and stock a certain number of lengths & our kits allow you to construct extra long 12" or 300mm diameter cardboard tubes in a huge range of lengths we don't hold. So whether you need 2m long, 2.5m long, 3m long, 3.5m long, 4m long, 4.5m long, 5m long, 6m long, 7m long or even longer...then our kits may be the way to go.

The couplers for our extension kits are cut between 448mm - 500mm long (appx)

All of our postal tube extension kits include two of the relevant size end caps

If you require larger quantities of our extra long postal tube extension kits, please call us for a quote.

To view simple step by step instructions on how to securely assemble your 12" diameter extra long postal tube extension kit, please click here

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Shipping Rates & Upgrades


FREE SHIPPING ON ORDERS OVER £30 (ex VAT)...
so no nasty surprises at checkout.

With the vast majority of items listed on this site being supplied without an additional charge for postage on orders over £30 NET .

The only time you may have additional charges is when you’re buying bulk quantities, very large items or you’re located offshore or in certain parts of the Scottish Highlands.

Please note that we cannot deliver to PO boxes.

Please check here for Offshore and Scottish Highlands shipping upgrades

If you require a faster delivery, click here for timed shipping upgrades

If you are ordering outside of the UK, please click here to see our international rates