Features: aluminum alloy material, wear-resistant and deformation resistant. Surface- anodizing treatment-.Fine workmanship, wear-resistant and corrosion-resistant 4040 aluminum profile Y-axis- synchronous belt stretching fit for Ender3 -V2 Ender3pro ENDER-3S CR20 3d printer 2020 X-axis belt tensioner suit to CR10 or CR-10S or CR10-S4 or CR10-S5 or CR10 mini or CR10 -V2 or CR10 -V3 or CR-10S-Pro or CR-10S -Pro -V2 or CR10 -Max or CR-X- or CR-X-Pro- or CR-6SE or Ender-3 or Ender-3Pro or Ender-3 -V2 or Ender-5 or Ender-5-Pro or Ender-5Plus or SV01 or SV02. 2040 Y-axis- belt tensioner is only suit to Ender3,not for Ender3Pro. Specifications: Name: 2020 or 2040 or 4040 aluminum profile X-axis Timing belt stretching Material: Aluminum alloy Surface-treatment-: anodizing Item Type:2020 X-axis or 2040Y-Axis-Ender or 4040Y or 2020X and 2040Y or 2020X and 4040Y or 2040Y-aix CR10 Note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1PCS Belt Stretching Tensioner Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.