Bopaodao Linear Rail Set, Shaft Guide and Linear Slider Block, 1Pcs SBR12-39.37 inch / 1000mm Rails 2Pcs SBR12UU Blocks Within Graphite Copper Sleevefor CNC Router Machine DIY Kit and 3D Printer Applicable for large-scale transmission equipment including industrial robots, cleaning equipment and supporting devices, etc. Please Note:we can offer the SBR supported linear rail in any length, pls contact us. Sliding blocks to be used cooperatively with rails, smooth sliding provided by inside linear bearing. SBR12 Linear Rail Set Of 2 Guide 600 Mm SBR12UU With Slider, 2 Pieces Metal Linear Rails Slide Rail Shaft 4 Pieces Sbr12uu Linear Trolley Block For Machine Tools Folders Welding Machine Etc CNC Machine Linear Guide Highlights SBR linear guide rail set:sbr12-1000 mm linear motion guide rail includes 2 x 39.4 in./1000 mm length sbr12 guide rails and 4 x sbr12uu slide blocks, dynamic load per block: 372 n, static load per block: 549 n Durable and long-lasting: the linear rail is made of carbon steel and aluminum with a chrome-plated surface for rust resistance and high durability, built-in 4 aluminum slide... LOW NOISE: Innovative slider technology, smooth, low friction, silent operation Specifications Brand: MssoommModel: SBR12Shaft Diameter: 12mmThis item includes:1pcs SBR12-39., 37 inch / 1000mm Linear Slide Guide Fully-supported Rails2pcs SBR12UU Bearing BlocksFeature & Application:Cylindrical guide composed by principal rail and aluminum support, stabilizing the original rail. VEVOR 2X SBR12-1000mm Rails Linear Rail Guide Shaft Rod 4X BENDING RESISTANCE: Strong bending resistance, difficultly deformed and twisted, ensuring linear motion