Feature: 1. Good Performance: This X axes linear rail kit has sleek and low friction motion characteristics that linearly reduce energy loss and mechanical wear, allowing the 3D printer to print at higher speeds. 2. High Accuracy: This 3D printer X axes linear guide has high rigidity and high stability, maintains better accuracy during movement, reduces printing vibration, and improves printing quality. 3. Excellent High Carbon Cr Steel Material: This 3D printer linear rail is made of excellent high carbon Cr steel material, which is strong and abrasion resistant, not easy to be damaged, and has a long service life. 4. Good Compatibility: This 3D printer linear guide rail has good compatibility, it is suitable for Neptune 3 MAX, for Neptune 4 MAX, and can be used to replace the old and damaged rails, very practical. 5. Modular Design: This printer linear rail guide kit features a modular design that requires no firmware or wiring modifications, is easily upgradable, and starts printing as soon as it is installed. Specification: Item Type: 3D Printer Linear Rail Material: High Carbon Cr Steel Application: For Neptune 3 MAX, for Neptune 4 MAX. Package List: 1 x Guide Rail 4 x Sliders 1 Pack x Screw Accessories 1 x Accessories