1 MODULAR DESIGN FOR EASY MODIFICATIONS: No firmware or wiring adjustments are needed. Upgrading is simple, allowing you to start printing right away. 2 LONG LIFESPAN: Constructed from high carbon chromium steel, the support rod offers exceptional wear resistance, minimal noise, even force distribution, and increased durability. 3 HIGH SPEED PRINTING: The linear motion attributes with smooth and low friction movement minimize energy loss and mechanical wear, enabling the 3D printer to operate at higher speeds. 4 HIGH ACCURACY PRINTING: The high rigidity and stability linear guide rail ensures excellent accuracy during motion, reducing printing vibrations and enhancing print quality. 5 APPLICABLE MODEL: This 3D printer support rod set is compatible with models designed for a specific brand, including Neptune4 and Neptune4 Pro3; please verify the model for optimal fitting!