Features Quick to Adjust: The Bearing Holder Enables Easy Adjustment on The Z Axes Lead Screw As Well As Firmly Keeping It Straight. Easy to Install: Can Be Installed on The 2040 Z Axes Aluminium Section Bar And 2020 X Axes Section Bar, Simple And Useful. Perfect Matches: Allows for Wide Application in Upgrading for Ender 3, for Ender 3 V2, And for Cr10 Series, Good in Match. Great Materials: Using High Quality Stainless Steel And Abs Materials, Not Easy to Malfunction And Durable for Long Using. Reliable to Use: Specially Designed for 3d Printers, The Z Axes Lead Screw Top Mount Ensures Stable And Efficient Working. Specification: Item Type: Z Axes Leadscrew Top Mount Product Material: Stainless steel, ABS. Product Compatible Models: For Ender 3, for Ender 3 V2, for CR10 series.  Package List: 2 x Fixing Bracket 1 x Bearing 4 x Screw 4 x Nut Package List 2 x Fixing Bracket 1 x Bearing 4 x Screw 4 x Nut