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This is another Combiner Wars truck trunk bed filler; this is designed to fold up and act as a shield that the toy can hold in 'bot mode.
This *is* compatible with Trailbreaker, along with Ironhide and Off Road. It is *not* compatible with First Aid (who has that area filled in).
This is provided as a four-part kit. Cut the parts off the sprue and discard that; supply your own pins (2mm brass tubing is recommended). Make sure that the tubing holes are well cleaned out before assembling--excess insertion force can break your part! Also, be careful to only apply glue to one part, because this won't work if you glue the tube to both sides of the hinge joint.
Please note! This product is a kit intended for advanced modelers. It requires that you supply glue, cutters, and tubing in order to work properly, and will need test-fitting and adjustment for best function. It is being sold at minimal markup due to the complexity of the assembly.