Cover for usual extension cord in combination with Apple Charger (Mac + old iPad) to match overall aesthetics
Replicate look of Apple's extension cable (https://www.apple.com/shop/product/MK122LL/A/power-adapter-extension-cable) with classic AC cable (Device socket C7 https://en.wikipedia.org/wiki/IEC_60320) and 3D printed bracket!
The author hasn't provided the model origin yet.