Models View all Ball screw (SFU1605) 46 2101 20 Ball screw nut housing (DSG16H) 29 1456 0 Profile 40x40 26 1407 0 Stepper motor NEMA 23 (CS-M22323) 23 1376 3 Ball screw nut (RM1605/RM1610) 28 1339 0 Profile 40x80 12 697 1