Bearings 1pcs SCS10LUU SCS12LUU SBR16UU SBR20UU SBR25UU SBR30UU Linear Motion Ball Bearing Slide Block Unit Bushing High-concerned chemical : None Material : AL Model Number : SCS10LUU SCS12LUU SBR16UU SBR20UU SBR25UU SBR30UU Certification : None