DescriptionY-axises Synchronous Belt Stretch Straighten Tensioner for Ender-3 CR-10/10S 3D Printer. Fit for Ender-3 CR-10/10S 3D Printer. Made of good quality material,durable to use. Good choice for your 3D printer.Features- Color: Black. - Material: Aluminum alloy - Size: 8.5x2.7x4cm - Y-axises Synchronous Belt Stretch Straighten Tensioner for Ender-3 CR-10/10S 3D Printer. - Fit for Ender-3 CR-10/10S 3D Printer. - Made of good quality material,durable to use. - Good choice for your 3D printer. - Warm Tip: Dear buyer, Due to lighting effect,monitor's brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand! Thank you!