VEVOR Linear Rail Kit, SBR25, 2Pcs 1200 mm (47.24 inch) Linear Motion Guide Rails and 4Pcs Bearing Slide Blocks, Fully Supported Shaft, for Cutting, Grinding, Milling, Drilling Machines, and More Complete Linear Guide Rail Kit Corrosion-Resistant Finish High Precision Heavy-Duty Load Capacity Widely Compatible Low-Noise Sliding Rail Length: 47.24 in/1200 mm,Static Motion Load Capacity: 1570 CON/93 kg,Slide Block Type: SBR25,Straightness: 5 mΩ/100 mm,Item Model Number: SBR25-C 1200L,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