... low noise 4. high precision 5 Bearing steel, carbon steel or accordign to customer Needle roller bearings/ one way clutch ... of sizes, which are appropriate for different applications. StructureNeedle roller bearingSeriesK, NA, NKI, RNA, NK,etcCageChrome steel, stainless ... the requirementDetailsWe have complete process for the production and quality assurance to make sure our products can meet your ...