Features: Enhances your 3D printing Precisions and stability with X Axises Synchronous Belt Tensioner, specifically for Ender 3 and similar models. from high strength aluminum alloy and stainless steel, this tensioner offer adjustable tension capabilities and supports multiple belt widths (6mm, 9mm, 10mm) for use. for 3D printing enthusiasts and professional to optimized their printer performances without complex modifications. Perfect for home workshops, educational, or professional studios where precise and 3D printing is essential. This accessory ensures long reliability, making it cost effective solution for maintaining and enhancing your 3D printers functionality. Specifications: Materials: Aluminum alloy, stainless steel Size:84x28x20mm Color: Black, Silver (optional) Styles: Width 6mm, 6mm 2.0version, Width 9mm, Width 10mm (optional) Package Includes: 1Set X Axises Belt Tensioner note: Please allow 1-3cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item.