Hardened precision steel balls in quality G10 according to DIN 5401. Data: Ø 3.969 mm, P5 - material 1.3505. weight per piece: approx. 0.257g, AISI 52100. 100 Cr6. hardness between 60 and 66 HRC. Balls made of this material have an excellent surface finish, excellent hardness and high load-bearing capacity. They are also dimensionally stable and extremely wear-resistant. The balls are non-magnetic, but can be attracted by magnets. G10 quality balls are very rare.
Steel balls in size 5/32" fit many loose ball bearings of 1" and 1 1/8" headsets.