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The aluminum shaft is the best solution for use with the SIMPLICITY® gliding bushings (FrelonGold). The hard anodized (up to RC70) and polished surface is corrosion-resistant. The shaft is non-magnetic, shock-resistant and prevents dirt, color - and welding syringe ranking liabilities due to the smooth surface.
The aluminum shaft is a good alternative to the steel and stainless steel shaft with the above characteristics.