Item No.: CF3TY~CF10TYBall: Gcr15 Steel, heat treated, HRC56 min; Precision ground polished hard chromium plated Body: Carbon steel, Zinc plated, chromate treated Liner: PTFE composite or PTFE fabric Stud: Low carbon steel, zinc plated Sliding contact surfaces: Steel/PTFE Composite or Steel/PTFE FabricPhone: +86-592-580 8851 / +86-592-580 7618Email: sales@ldk-bearing.com ; benjamin@ldk-bearings.com