Case for Kindle Paperwhite, it is a protector that helps to cover Kindle Paperwhite if you print it with TPU it looks great Parameters: layer height: 0.2 walls: 4 Top and bottom layer: 4 Speed: 35 Material: TPU preferably, but it can also be printed in pla, I liked it better in PLA In the back, those holes were left for a better grip and so that the Kindle does not get hot