Item No.: GEG15ET-2RS~GEG110ET-2RS, GEG120XT-2RS~GEG280XT-2RSOuter Race: Gcr15 Steel,hardened HRC 54-60,surface phosphated,with liner of PTFE fabric. Inner Race: Gcr15 Steel,hardened HRC 58-64,precision ground,hard chrome plated. Sliding contact surfaces: Steel/PTFE fabric.Phone: +86-592-580 8851 / +86-592-580 7618Email: sales@ldk-bearing.com ; benjamin@ldk-bearings.com