Bearing ball CeramicSpeed Silicon Nitride 5/32" (3,969mm) (101302)

5/32" (3,969 mm)Every CeramicSpeed Ball is made of the highest quality Grade 3 Silicon Nitride, featuring the highest achievable surface finish and roundness. The quality of the balls is what determines the performance and longevity of a bearing.The production of a CeramicSpeed Ball is a time-consuming process that ensures the highest quality ceramic ball, which is smoother, rounder and harder than any other steel or ceramic ball available on the market.