Function: Dual z axis upgrade kit reduces layer wrinkles caused by z axis vibration, avoids backlog of consumables, improves the stability of 3D printing, and improves the printing performance of 3D printersQuality: Professionally manufactured by 3D printer, stable performance, and long term useSmooth operation: The 3D printer kit with a dual z axis structure makes it easier to level the printer, and the two ends of the axis rises and fall synchronously, greatly reducing the difficulty and recurrence rate of bed levelingMaterial: The 3D printer dual z axis upgrade kit is made of aluminum alloy material, which is strong and wear resistant, not easy to damage, ensuring long term performance and reliabilityReplacement: Metal dual z axis kit can be directly replaced without complex tools, easy to use Specification: Material: Aluminum alloy Size Chart: Guide rail length 53.3 cm/20.98 inch Package Includes: 1 Dual Z axis upgrade kit Note: Please allow slightly errors due to manual measurement and different monitors.