... price ball bearing Grade: 316 304 440C Stainless steel Ball Bearings Stainless steel Ball bearing 304HCDiameter : φ0.5mm- φ ... resistance and ware resistance Applications:Bearings,stampings,valves,aerosapce,seal,colling equipment, high precision instrument. Stainless steel ball ... : φ1.588mm- φ38.1mmFeatures: martensite steel (aslo called stainless steel iron ),hardness 51°-53°,magnetic,good corrosion ...