These bars have a finished surface, with buffing after chrome plating, and very limited roughness (Ra max 0.25 µm), very tight diameter tolerances (f7), straightness 0.7/1000 mm max, ovalization – triangularity less than half the diameter tolerance, chrome plating 20 µm min, concentricity of plating +/- 2 µm, hardness HV 800 – 1000, and corrosion resistance of 200 hours, rating 9 NSS-ISO 9227.
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