ITEM NAME:2x Alloy V-Slot 2020 Synchronous Belt Tensioner Profile Kit For CR10 CR10S .like-pro-float .like-pro-price-both{clear: both;.Applicable models: suitable for CR10 CR10S Ender-3 3D printers Material: Aluminum alloy. 2 Pieces 2020 Straighten Tensioner. Material:Aluminum alloy.