5PCS 39.4 in (1000 mm) T Slot 2040 Aluminum Extrusion Anodized Linear Rail Modular Design Excellent Corrosion Resistance Enhanced Stability High Compatibility Reduced Friction High Compatibility Number of Pieces: 5,Item Model Number: 2040-100-5,Surface Treatment: Anodized,Material: 6063-T5 Aluminum Alloy,Compatible T-Slot Nut Sizes: M4, M5, M6,Product Dimensions: 39.37 x 0.79 x 1.57 in / 1000 x 20 x 40 mm,Center Hole Size: Φ0.16 in / Φ4.2 mm,Net Weight: 8.71 lbs / 3.95 kg (Includes 5 pieces)