Bushing for Rod 1) steel backing, sintered porous bronze, PTFE layer 2) oil less,self-lubricating 3) low wear,low ... for Rod application.With a steeel body, bronze liner and PTFE/lead overlay, bearing bushings possess excellent wearability and tremendous compressive ... steel backing bonded to a porous bronze sinter layer with filled PTFE on its surface.2, The color of DU bushing's ...