ITEM NAME:100 PCS 6mm G10 Hardened Chrome Steel Loose Bearing Ball Bearing Ba Gn Information: Grade 10 Chrome steel bearing balls are widely used in precision ball bearings as well as most aerospace, transportation and industrial applications. Chromium (Cr) has a tendency to increase hardness, toughness and wear resistance of steel. Chrome steel is a chrome alloy carbon steel, not a chrome plated steel Information: Chrome steel balls have excellent surface quality, high hardness and high load bearing capacity as a result of through hardening (Rockwell C 60-67). Chrome steel is aproximetly 96% iron and capable of being attracted by a magnet Usable With: All RC Cars, Heli, and Planes and other electronic appliances Package included: 100 PCS Bearing Ball.Chromium (Cr) has a tendency to increase hardness, toughness and wear resistance of steel. 100 PCS Bearing Ball. Due to the light and screen setting difference, the item's color may be slightly different from the pictures.