aluminum heatsink 3d model

This is an aluminum heatsink. Please reconstruct only the clean geometric structure and ignore all surface scratches, dirt, or white filler marks. The object consists of a solid rectangular base and two symmetrical groups of thin parallel cooling fins. Each fin is straight, evenly spaced, and vertically oriented. There is a central recessed channel dividing the two fin groups, with two circular mounting holes on the center plate. Rebuild the fins, spacing, base block, and all proportions accurately as shown. The material should look like clean brushed aluminum, but the model must remain 3D-printable in PLA. Do not add or remove any geometry. Reconstruct the shape exactly based on the reference image.