VEVOR Linear Guide Rail Set, SFC20 1200 mm, 2 PCS 47.2 in/1200 mm SFC20 Guide Rails 4 PCS SC20 Slide Blocks 4 PCS Rail Supports, Linear Rails and Bearings Kit for Automated Machines CNC DIY Project 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: SFC20-1200L,Product Dimensions(L x W x H): 47.2 x 4.7 x 2 in/1200 x 120 x 51 mm,Package Size(L x W x H): 51.6 x 5.7 x 3.1 in/1310 x 145 x 80 mm,Dynamic Load (per block): 882 N,Mounting Hole Distance B: 1.6 in/40 mm,Mounting Hole Distance A: 1.6 in/40 mm,Slide Block Size(L x W x H): 2 x 2.1 x 1.6 in/50 x 54 x 41 mm,Static Load (per block): 1370 N,Slide Block Model: SC20,Net Weight: 15.7 lbs/7.1 kg,Guide Rail Length: 47.2 in/1200 mm