Feature: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 AlloyAdjustable Distance: Approx. 8mm / 0.31inAdjustable Belt Length Limit: Approx. 16mm / 0.63in.Package List:1 x Belt Tensioner 2 x Screw 2 x Nut