VEVOR Linear Guide Rail Set, SBR16 800mm, 2 PCS 31.5 in/800 mm SBR16 Guide Rails and 4 PCS SBR16UU Slide Blocks, Linear Rails and Bearings Kit for Automated Machines DIY Project CNC Router MachinesHandle Pressure with EaseSmooth Sliding without StutterMore Accurate Than EverBroad Usage ScenariosStrong Corrosion ResistanceInstallation Made EasyMounting Hole Distance A: 1.3 in/32 mm,Slide Block Size(L x W x H): 1.8 x 1.8 x 1.3 in/45 x 45 x 33 mm,Static Load (per block): 1180 N,Shaft Diameter: Φ16 mm,Slide Block Model: SBR16UU,Material: High Carbon Steel & Aluminum,Model Number: SBR16-C 800L,Guide Rail Length: 31.5 in/800 mm,Dynamic Load (per block): 774 N,Mounting Hole Distance B: 1.2 in/30 mm