Because there plastic and I dont do injection mold, and why would I want to spend the time or effort milling them out of an alloy, when i can just purchase in bulk for less then I can make them.
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ya looks like alibaba it is, I have been looking around for a while, and even to have a local plastic injection company, or having them milled from aluminum cost 10x the price then to have them imported.
its to bad union labor is so high, guess the good'ol USA will miss out on some of my pennies....