A screen holder to mount a Waveshare 7'' display to the Raspberry PI 400. Uses the bracket created by vman81 here: https://github.com/vman81/pi400-mount/
On the back you can see glued my WD SSD holder, it's available separately.
What you see white on the side is a glued piece left from a test print of the SSD holder to hold the screen sideways but it's not needed. If your screen slides easily left-right you can add a layer or two of electrical tape on the bottom of the holder making a tighter fit.
The author hasn't provided the model origin yet.