Du Bearing & Du Bushing (SF-1) , Steel Backing, PTFE Lining, Dry Bearing Sino Bronze Co., Ltd. Base Info Description Pre：Sankyo Oilless Sob Guide Bushing, Straight Bush, So#50sp2 Bronze with Graphite Next：Dp4 Bush & Dp4 Bearing, Dp4b Bush & Dp4b Bearing, Fibres and PTFE Lined, Steel Backing.
