This is a large mainboard box that allows you to hold a double mosfet, it has large holes to make wires pass through. The hexagonal ones are for ventilation. I removed the right wall and made holes under mainboar and mosfet for reduce print time.
The cover is able to hold a fan and its wires. Now I'm working to it looks better
Its like the normal box but with the SD holder at top left of the box.
sd adapter - https://goo.gl/WZLv5c