1. Quality : High 2. Delivery time: 20 days normally 3. ISOTS16949 certified manufacturer 4. Small order accepted. high quality ,low price PTFE with lead 0.01-0.03mm. Porous bronze 0.2-0.3mm.Steel backing 0.7-2.3mm. Tin-plating 0.005mm or copper plating0.008mm. SF-1DU No Oil Lubrication Bearing