If the casing for your PowerBook Duo power adapter cracked/broke, or you intentionally broke it in order to open it up to recap the power adapter, then this model is for a replacement case for the power adapter.
The exterior is not exactly 1:1 as Apple's original as I did not want the exterior curve on the top. But the interior dimensions should house the power adapter well.
This design does carry over the cable cord holders that open and close. You cannot however reuse the original holders from Apple. I have included models for those as well. But you will need to reuse the metal pieces that provide the ‘snapping’ functionality for the holders.
I have also carried over the four exterior accessible holes mainly to test power voltage, etc. These holes however will not work with Apple's attachable battery charger assembly as I don't have one of those and am not in a position to model how the mating happens between the power adapter and the battery charger.
The author marked this model as their own original creation.