ITEM NAME:2x Black Y-axis Synchronous Belt Stretch Straighten Tensioner For Ender3 PRO .like-pro-float .like-pro-price-both{clear: both;.Useful upgrade parts fir for Ender3 printer, you can adjust the belt freedom,more better than original. 2x Y-axis synchronous belt stretching. Material: 4040 aluminum alloy material, composed of high Y-axis synchronous.
