VEVOR Linear Motion Set, SBR20 1500mm, Comes with Two 59 in/1500 mm SBR20 Rails & Four SBR20UU Blocks, Ideal for DIY CNC and Automation Tasks Handle Pressure with Ease Smooth Sliding without Stutter More Accurate Than Ever Broad Usage Scenarios Strong Corrosion Resistance Installation Made Easy Shaft Diameter: Φ20 mm,Material: High Carbon Steel & Aluminum,Model Number: SBR20-C 1500L,Product Dimensions(L x W x H): 59 x 3.5 x 1.4 in/1500 x 90 x 36.3 mm,Package Size(L x W x H): 62.2 x 5.7 x 3.1 in/1580 x 145 x 80 mm,Dynamic Load (per block): 882 N,Mounting Hole Distance B: 1.4 in/35 mm,Mounting Hole Distance A: 1.4 in/35 mm,Slide Block Size(L x W x H): 2 x 1.9 x 1.5 in/50 x 48 x 39 mm,Static Load (per block): 1370 N,Slide Block Model: SBR20UU,Net Weight: 22 lbs/10 kg,Guide Rail Length: 59 in/1500 mm