AISI 304 stainless steel ball bearings have much greater corrosion resistance than those made of SAE 52100 bearing steel or AISI 440C stainless steel. The material is widely used as corrosion and heat resistance steel and also as nonmagnetic steel. but they have a lower load capacity. Brand： JRZC/SUFUL/OEM Model： S304-r-R133 MOQ： 1 Specification： d:2.381mm, D:4.763mm,B:1.588mm Unit： sets Package Instruction： Carton/wooden-case