2PCS SBR12/16/20/25 Linear Rails+4PCS 4X SBR12/16/20/25/UU Bearing Blocks CNC UK

2X SBR20 Linear Rails +4X SBR20UU Bearing Blocks. 2XSBR16 Linear Rails +4X SBR16UU Bearing Blocks. 2XSBR12 Linear Rails +4X SBR12UU Bearing Blocks. Cylindrical guide composed of principal rail and aluminum support, stabilizing the original rail.

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