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Anodized Black Aluminum Stirling Engine
                                                                                                                                                                                                                                                                                                           
Model
Anodized Black Aluminum

The anodized black plates make a nice contrast to the stainless steel screws, which creates a "technical" accent to the engine's appearance.

The black colour absorbs radiated heat (i.e from a lamp), which helps the engine to run at low temperatures.

Also, the anodized surface is less subject to possible scratches, because it is harder than unprotected aluminum.