The Vevor 2040 T-slot aluminum extrusion linear rail set includes five 78.74-inch rails designed for DIY builds, 3D printers, CNC machines, laser engraving setups, and automation projects. Made from 6063-T5 aluminum alloy with an anodized finish, these rails are built for durability and corrosion resistance. Precision-cut surfaces help support smooth operation and reliable alignment. The side groove design is compatible with M4, M5, and M6 T-slot nuts for flexible assembly. This lightweight rail system offers a versatile foundation for custom structural and motion-based applications.