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Extra Heavy Duty Cardboard Boxes

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  • Strong & sturdy extra heavy duty boxes for heavy items
  • Popular alternative to triple wall boxes
  • Robust and extra strong for transporting heavy items
  • Ideal for exporting heavy and extra fragile items
  • Maximum load, Edge Crush Test and Box Compression Test values printed on small flap
  • Technical drawings and other data are provided for each size, click the 'more info' link to view


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Show Dimensions In:
Length x Width x Height Details Boxes Per Pack Price Per Box Enter No. Of Boxes
180 x 180 x 180 mm
20 66.4p 61.7p 55.7p 52.7p 48.3p Remove 20 unitsAdd 20 units
255 x 255 x 255 mm
20 £1.03 96.6p 91.8p 89.1p 85.3p Remove 20 unitsAdd 20 units
457 x 305 x 305 mm
10 £2.51 £2.38 £2.25 £2.19 £2.09 Remove 10 unitsAdd 10 units
508 x 508 x 508 mm
10 £5.71 £5.38 £5.12 £4.96 £4.75 Remove 10 unitsAdd 10 units
610 x 457 x 457 mm
10 £5.50 £5.18 £4.93 £4.78 £4.58 Remove 10 unitsAdd 10 units
720 x 525 x 430 mm
10 £6.24 £5.88 £5.60 £5.43 £5.19 Remove 10 unitsAdd 10 units
800 x 500 x 500 mm
5 £6.48 £6.10 £5.81 £5.64 £5.39 Remove 5 unitsAdd 5 units
1010 x 510 x 510 mm
5 £9.36 £8.70 £7.87 £7.44 £6.83 Remove 5 unitsAdd 5 units
1200 x 300 x 300 mm
5 £6.94 £6.44 £5.83 £5.52 £5.05 Remove 5 unitsAdd 5 units
1200 x 600 x 600 mm
5 £15.34 £14.25 £12.90 £12.19 £11.18 Remove 5 unitsAdd 5 units

Strong, extra heavy duty boxes

Our strongest, sturdiest corrugated boxes are designed for heavy goods and providing maximum protection. When shipping or transporting heavy goods, items prone to damage in the supply chain or goods with a high value, it is vital that strong, reliable and robust outer protection is used. We have a wide range of sizes suitable for engineering equipment, automotive parts, electronics equipment, machined parts, hydraulic components and much, much more. Given the high value of the goods shipped using this type of cardboard box our customers need peace of mind that our extra heavy duty cardboard boxes will more than deliver on the promise of providing the right protection.

Extra heavy duty cardboard boxes from Kite Packaging are manufactured to a high technical degree and have been added to our range following in-depth research and development. They have also been subjected to rigorous testing to ensure they are fit for the purpose of looking after your valuable or heavy items.

Popular with companies exporting goods aboard, our new heavy duty cartons are now a more popular choice for customers who previously favoured triple wall corrugated cartons as their method of packing. Made from heavy weight board and with strong fluting combinations, these extra heavy duty boxes are more cost effective than triple wall cartons.

Rigorous testing procedures

For many customers purchasing these cartons it is vital to understand the specifics of their technical make up and performance. The product table above summarises the key technical specifications and by clicking on the ‘More info’ tab you can access even more in-depth and relevant facts. These include important metrics about how these boxes perform:-

  • Maximum load:
    This is the maximum weight that the box can support without the sides buckling.
  • Edge Crush Test (ECT):
    This measures the top to bottom compression strength of the board. It gives information on the ability of a particular board construction to resist crushing. A laboratory test method is carried out that measures the cross-directional crushing of a sample of corrugated board.
  • Box Compression Test (BCT):
    This measures the compression resistance, shape change and stacking capability of the carton. The BCT of a corrugated box is the maximum force sustained by the box during compression, and is an indication of the stacking resistance of the box during storage and transport.

On each related ‘More info’ table you will also find both the internal and external measurements of the boxes. The external dimensions for this type of box, with its typical applications, are vital for anyone using them to export out of the country. This is because the exact space the filled box will occupy is a key element for calculating the cost of export and is a key measurable for shipping companies.

If you need any further information on our Extra Heavy Duty Cardboard boxes, or any other items in our range our sales team are always happy to help.

Below is a diagram representing the flutes our extra heavy duty cartons are manufactured with. Please click on the ‘more info’ tab in the price table to see which flute applies to your chosen size.

flute diagram