Upgrade 2020 Profile X-axis+4040 Double Slot Profile Y-axis Synchronous Belt Stretch Straighten Tensioner for Ender-3 Pro/Ender3 V2/CR-20 Pro 3D.

Materials:3D Printer belt tensioner made of good quality cold rolled sheet materials, Surface oxidation treatment, Sturdy, fine workmanship Install: Already assembled, you don't need to assemble it by yourself, No need to change the original belt length, direct installation and ready to use Function: you can adjust the belt freedom, more better than original Widely Used: Widely used for Ender-3 upgrades Series Package Content:1 Kit 2020 Profile X-axis Synchronous Belt,1 Kit 4040 Profile Y-axis Synchronous Belt Stretch Straighten Tensioner