RXTNC Ball Screw Package SFU1204 SFU1605 SFU1610 2005 L300-1500mm with Single Nut+BF12+DSG16H+Coupling+HM12-57 Motor Mount For CNC Product checklist: 1PCS SFU1605 Ball screw with nut(Size:550-1000mm) 1PCS HM12-57 Motor block 1PCS DSG16H Nut seat 1PCS BF12 help seat 1PCS Coupling D25L30-8mm*10mm(Default 8*10 aperture, if you happen towantdifferent aperture, please contact us!) 1PCS M12*1 Lock nut