4040 aluminum profile Y-axis- synchronous belt stretching fit for Ender3 -V2 Ender3pro ENDER-3S CR20 3d printer. 2040 Y-axis- belt tensioner is only suit to Ender3,not for Ender3Pro. Item Type：2020 X-axis/2040Y-Axis-Ender/ 4040Y/ 2020X and 2040Y/ 2020X and 4040Y/ 2040Y-aix CR10.
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