1、INCLUDED TOOLS: Including optical axes, lead screw, housing bearing, linear guide bracket, CNC stepper coupler and ball bearing, which is a practical 3D printer part set. 2、OPTICAL AXES: Linear optical axes with rod guide, suitable for electronic equipment, guide rod, drive shaft or pillar, used in digital 3D coordinate measuring equipment, etc. 3、BEARING HOUSING: The zinc alloy bearing housing has a certain bearing capacity and can be installed on the ordinary precise rack, which has strong adaptability. 4、ALUMINUM MATERIAL: The lead screw, guide shaft support and slide block are made of aluminum material, with high accuracy and good strength, wear and rust resistance. 5、STANDARD SIZES: These accessories have standard sizes, with easy installation and stable structure, and are widely used in machine tools such as 3D printing.