1EASY MODIFICATION: The 3D printer X axes rail feature a modular design that require no firmware or wiring modifications. Easy to upgrade and start printing immediately 2LONG SERVICE LIFE: X axes linear guide is made of high carbon chromium steel, possess strong wear resistance, smooth movement, low noise, uniform force, more durable 3HIGH SPEED PRINTING: Linear guides with smooth and low friction motion characteristics reduce energy loss and mechanical wear, enabling 3D printers to print at higher speeds 4HIGH ACCURACY PRINTING: High rigidity and high stability of the linear guide, can maintain better accuracy in the process of motion, reduce printing vibration, improve printing quality 5APPLICABLE MODEL: 3D printer linear rail guide kit is suitable for models of for Ender3, for Ender3 pro, for Ender3 V2, for Ender3 S1, for Ender3 S1 Pro 1 xX AxesRail 3 x Sliders 10 x Screws 1 x User Manual 4 x Accessories