1MODULAR DESIGN FOR EASY MODIFICATIONS: No firmware or wiring modifications required. Easy to upgrade and start printing immediately. 2LONG LIFESPAN: Made of high carbon chromium steel material, the support rod features strong wear resistance, low noise, even force distribution, and more durable. 3HIGH SPEED PRINTING: Linear motion characteristics with smoothly and low friction movement reduce energy loss and mechanical wear, allowing the 3D printer to print at higher speeds. 4HIGH ACCURACY PRINTING: High rigidity and stability linear guide rail maintains excellent accuracy during motion, reducing printing vibrations and improving print quality. 5APPLICABLE MODEL: The 3D printer supporting rod set is suitable for Neptune4, for Neptune4 Pro3, check the model for better fit 4 x Steel Tube 4 x Metal Bracket 2 x Wrench 1 x Instruction Manual 7 Bag x Accessory