rectangular block 3d model

A solid rectangular mechanical base block for a machine assembly. Dimensions: 150mm length, 110mm width, 20mm height. Sharp 90-degree corners, perfectly flat parallel surfaces, no textures, smooth industrial plastic look. On the rear top surface, it should feature two clean 16mm diameter circular flat indents spaced 120mm apart. Simple geometric solid CAD model, clean topology, ready for 3D printing.