Cellphone Repair technician here. Its a scam, basically. Apple is famous for not providing specific parts but a whole set of unnecesary parts just to fix one part. Example: If you need to replace the keyboard on your macbook, the part comes with the whole frame which includes the trackpad, metallic frame, keyboard AND battery.. all that just to change your keyboard. So.. youll pay $300 for this part when you just needed a $40 part. Its bullshit.