●【Application】Applicable to Ender 3, Ender 3 v2, Ender 3 pro, Ender 3 s1, Voxelab Aquila X-axis linear guide upgrade kit. ●【Installation】It is easy to install and does not affect the print size of the printer. The MGN 9H linear guide rail is lighter and reduces the Z-axis load. ●【Advantages of linear guide】improve printing accuracy, increase service life. ●【Material】 Aluminum alloy bracket, MGN 9H linear guide rail with oxidized surface. ●If there is any quality problem with the product, please contact us, and we will solve it for you.