2. Linear bearings and complete linear sets to suit round bar 3. Support Rail – Linear Rail 4. Ceramic and self lubricating bearings 5. Profile rails and support/carriage bearings 6. Ball screw nuts 7. Ball screw 8. Ball Spline bearings and spline shaft 9. Ball transfer units 10. Linear modules 11. Rack and Pinion 12. Acme or Trapezoidal nuts