General description The Mophorn SBR Linear Guide Rail Set is designed for precision engineering and robust performance, featuring two 800 mm (31.5 in) guide rails and four SBR20UU slide blocks. Made from high-grade aluminum and carbon steel, this set ensures smooth, quiet operation and exceptional durability, making it ideal for CNC router machines and various DIY automated projects. Technical specifications Guide Rail Length: 800 mm (31.5 in) Model Number: SBR20-C 800L Net Weight: 6.4 kg (14.1 lbs) Dynamic Load (per block): 882 N Slide Block Model: SBR20UU Shaft Diameter: Φ20 mm Product Dimensions (L x W x H): 800 x 90 x 36.3 mm (31.5 x 3.5 x 1.4 in) Material: High Carbon Steel & Aluminum Slide Block Size (L x W x H): 50 x 48 x 39 mm (2 x 1.9 x 1.5 in) Mounting Hole Distance A: 35 mm (1.4 in) Mounting Hole Distance B: 35 mm (1.4 in) Static Load (per block): 1370 N Package Size (L x W x H): 900 x 145 x 80 mm (35.4 x 5.7 x 3.1 in) Compatibility and accessories Includes 4 x SBR20UU