The file 'Gigabyte H110M-S1 H61M-S1 And Other S1 And S2 Models(?) I/o Shield 3D Printer Model' is (stl) file type, size is 939.0KB.
I/O shield for gigabyte S1 and S2 intel motherboards, tested with h61m-s2-bv and h110m-s1, other model have visual similar rear ports layout but can have a little moved connectors.