VEVOR Linear Rail Kit, SFC25, 2Pcs 1000 mm (39.4 inch) Linear Motion Guide Rails and 4Pcs Bearing Slide Blocks, for DIY Engraving Machine Lathe Milling Machine Slides, DIY Training Rocker Plate Complete Linear Guide Rail Kit Corrosion-Resistant Finish High Precision Heavy-Duty Load Capacity Widely Compatible Low-Noise Sliding Rail Length: 39.4 in/1000 mm,Static Motion Load Capacity: 1570 CON/93 kg,Slide Block Type: SC25,Straightness: 5 mΩ/100 mm,Item Model Number: SFC25 1000L,Dynamic Motion Load Capacity: 980 CN/67 kg,Quantity: 2 pcs,Surface Finish: 0.1–0.22 μm,Material: High Carbon Steel & Aluminum,Diameter: Ø 0.98 in/25 mm