This is a case for mounting an LCD smart controller with a built in SD card reader on a 3D printer. Currently used in the TubularBot printer, would also work with compatible Prusa i3 printers. The case includes a slot for the SD card to pass through. Comes in two parts, which are bound together by M3 hex screws at each corner. There are two mounting holes on the bottom for binding it to a metal or wood frame.