Item No.: CM3T~CM14TBall: Gcr15 Steel, heat treated, HRC56 min; Precision ground polished hard chromium plated Body: Carbon steel, Zinc plated, chromate treated Race: PTFE composite or PTFE fabric Sliding contact surfaces: Steel/PTFEPhone: +86-592-580 8851 / +86-592-580 7618Email: sales@ldk-bearing.com ; benjamin@ldk-bearings.com