4PCS 39.4 in (1000 mm) T Slot 2040 Aluminum Extrusion Anodized Linear Rail
2040 T Slot Extrusion Linear Rail. Built to Last: The anodized linear rail is made from durable 6063-T5 aluminum alloy with an anodized finish for excellent corrosion resistance. Versatile for Any Project: Lightweight and flexible, these linear rails can be used in a variety of projects without the need for welding.