ITEM NAME:2040 Aluminum Profile Y-axis Synchronous Belt Stretch Straighten Tensioner Set Description: Y-axises synchronous belt stretch straighten tensioner for Ender-3 CR-10/10S 3D printer. Made of high quality stainless steel material, surface anodizing treatment, effective protection, durable to use and long service life. Very useful upgraded parts for series printer, you can adjust the belt freedom. Easy to operate, simple combination installation and use. Good replacement part choice for your 3D printer. Specification: Material: Stainless Steel Size: Approx. 15 x 10 x 4cm / 5.91 x 3.93 x 1.57inch Package Includes: 1 Piece Y Axis Stretch Belt Straighten Tensioner Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement. SKU: ALU0011421677016689.1 Piece Y Axis Stretch Belt Straighten Tensioner. Very useful upgraded parts for series printer, you can adjust the belt freedom. Easy to operate, simple combination installation and use.