12 parts.

• Ball BearingFreeCAD Library
• Ball Bearing (Parametric)ReDo.Pro
• Bearing BlockReDo.Pro
• Lead ScrewReDo.Pro
• Lead Screw NutReDo.Pro
• Linear BearingFreeCAD Library
• Linear Bearing (Parametric)ReDo.Pro
• Linear Guide CarriageVarious
• Linear Guide RailReDo.Pro
• RodReDo.Pro
• SC8UU Linear Bearing BlockFreeCAD Library
• Threaded RodReDo.Pro