2020 X-synchronous aluminum profile stretching. Made of high quality aluminum alloy, durable to use. Anodizing treatment, effective protection. Easy to use, simple installation and combination use. Suitable for , -10, -10S and other 3D printers. Specifications: Treatment: Anodic oxidation Color: Black Material: Aluminum alloy Package Contents: 3 * Tensioner Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.