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Thanks hendersdc!

Good contact, thank you KENAT.

KENAT, I'm probably ordering in batches of 5000. Annual volume will depend on sales of the product.

Actually, I stand corrected. After reading through the link IRstuff sent I realize that this part is "cold forged"... it seems to be a process that's often used in heat sinks. http://www.led-heatsinks.com/sale-1256914-customized-design-cold-forging-led-downlight-heat-sink-pin-fin-heat-sink.html

Thanks everyone! I think IRstuff and berkshire nailed it, investment casting. I never thought of investment casting as a high-volume process but I am now reading about it being used in automotive. According to the design guides you can get thin wall, there's no draft required, and tolerances...

I'm working on a project that requires a heat sink for a high power LED. The unit shown in the linked images works well, the problem is that I can't figure out how it was manufactured and I need to create something similar but customized to this project. This heat sink is from a fairly high...