The Vevor aluminum extrusion linear rail set includes five 2040 V-slot profiles designed for smooth, stable motion in DIY and industrial builds. Made from 6063-T5 aluminum alloy with an anodized finish, these rails resist corrosion, oxidation, and scratches for long-lasting use. They are compatible with standard M5 T-slot nuts, V-slot wheels, and pulleys for use in 3D printers, CNC machines, laser engravers, workbenches, and display structures. High-precision cutting and factory-tested straightness help provide accurate, burr-free performance.