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This is for a part that holds a power of the Transformers Power of the Primes Matrix in the center of the chest for a Transformers Seige Ratchet Ironhide or Crosshairs. This part does not interfere with transformation into Truck mode, but you will need to remove the matrix for the transformation to work.
This is intended for adult figure collectors. This is not designed for rough play by children.
Depending on the plastic you choose, sanding or polish may be needed to fine tune the fit.
This has been tested with my home 3D printer with PLA Plastic