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INEX (Independent Extrusions) is the largest extruder of aluminium in New Zealand, supplying aluminium for approximately 70% of New Zealand's windows and doors.

INEX has two extrusion presses (2400 tonne 8 inch press and 1800 tonne 7 inch press), and uses the latest manufacturing processes.

INEX sources an overwhelming majority of their aluminium billets straight from Tiwai Point smelter in Bluff. INEX has a commitment to sustainability, and is the only extrusion company in the Southern Hemisphere to recycle billet with Tiwai with 99.9% of all aluminium waste sent back to the smelter and recycled.

Most of the billet from INEX is part of Rio Tinto’s START programme which allows full traceability and provides a digital sustainability label with information such as where the aluminium was produced and information from its production such as carbon footprint, water use, recycled content and energy sources.

Because Tiwai is fuelled by renewable energy, the billet they produce is some of the greenest in the world.