Features 1、Applicable Models: This belt tensioner is suitable for Ender 3, for Ender 3 Pro, for CR10, for CR10S, for CR10 S5 3D printer. It even fits the Y and X axes of the for Ender 5 plus. 2、Main Application: This belt tensioner can be adjusted freely, which is beneficial to improve the printing quality. 3、Parameter: This belt tensioner has an adjustable distance, 8mm. And an adjustable belt length limit, 16mm. 4、Long Life Span: Made of aluminum alloy, surface anodized, this belt tensioner is rust resistance and corrosion resistance, comes with a long life span. 5、Easy to Install: This belt tensioner is pre assembled, the easy installation can be quickly completed. Specification Item Type: Belt Tensioner Material: Aluminum Alloy Adjustable Distance: Approx. 8mm / 0.31in Adjustable Belt Length Limit: Approx. 16mm / 0.63in Package List 1 x Belt Tensioner 2 x Screw 2 x Nut