Chair leg core replacement. See Picture.This is at this moment a Prototype and only works for 5 weeks if you print it in PLA. ABS should be stronger. But I will come with a better version.Version 1 is not in perfect dimensions so you need a heat gun to head up the metal parts of the chair en meld them in to the printed part. This will be fixed in the next version.I need to make a stronger version so there will be a version 2 in the future.