Features: Brand new and high quality Replacement Belt Tensioner Part,The Original machine only have a belt pulley,you can adjust the belt freedom,Easier to adjust belt, high-precision and better printing effect. The X-axis and Y-axis belt can be adjusted by turn the screw by hand. Made of aluminum material, durable to use.Surfaces anodizing , effective protection. This belt tensors only suit for Sidewinder X1 X2.please confirm your machine model before order. Compacts and versatiled unit is easy install and maintain. Specifications: Material:Metal Color:Black/Blue Application:For Sidewinder X1 X2 Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Straighten TensionerProducts from KJ's store