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This high-quality aluminum expansion box kit allows the use of 6" North Star dies on any 4" North Star extruder.
All the mating surfaces of this expansion box are machined flat for a tight seal. The die retainer ring and the hardware is made of steel. All outside surfaces are powder-coated for a durable lasting finish.
The kit includes: the expansion box, die retainer ring and mounting bolts, hex wrench, three-piece spacer board and lag bolts.