Cheap block bag, Buy Quality block city building blocks directly from China block high Suppliers: 2 pcs SBR20 L = 2300mm Linear Rails +4 pcs SBR20UU straight-line motion block for SFU2005 Ball screw (can be cut any length)
2 pcs SBR20 L = 2200mm Linear Rails +4 pcs SBR20UU straight-line motion block for SFU2005 Ball screwPackage Contents:2 X SBR20 - 2200mm4 X SBR20UU(can be cut any length)