Mixing Balls 6.35mmMixing Balls 6. 35mm Set of 40 Stainless steel bearing balls in 6. 35mm to mix paints. These mixing balls are coming with a special coat to make them completely paint proof which will avoid the rusting process after long periods of contact with paints that may ruin the paint colors. They are not magnetic but they will be attracted by magnets. They are suitable either for personal or industrial uses in order to guarantee a proper mixture of all paint