The file 'Hephestos Frame Mount For Geared Nema17 Stepper 3D Printer Model' is (stl) file type, size is 28.5KB.
I use a couple of these mounts to put my extruders on top of the frame after I installed e3d chimera dual hotend and converted extruder into bowden.
You need a couple of m3x15 screws and m3 nuts.