This is an insert that will hold the HUDY 1/8 offroad setup station. This measures 190x75mm in size, you can find an assortment of cases it will fit in but it was designed for this case:
https://www.rcamerica.com/hudy-hard-case-215x90x85mm-accessories-air-vac-1-8-off-road-199294-h
This was designed so the parts fit slightly snug, you may need to adjust depending on the tolerance of your printer. The idea is that the setup station will be secure when sitting upright, pack with a towel or something if you're going to air ship or store it upside down.
The author marked this model as their own original creation.