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Product Introduction:SF-1X Self Lubricating Bushing It is the substitute of and parallels in performance with abroad  DU. It is wall wrapped  bearings made of triple layer composites material which consists of a steel  backing,Website:http://www.oillessbearing1.com, a sintered porous bronze particles interlayer and calendared with  PTFE and Pb mixture as surface layer. It is low friction coefficient,  anti-wear, anti-corrosion and can be used without oil, or only when needed. Moreover,  it is