High-quality materials: The linear guide is made of high-quality carbon steel, and the bearing seat is made of aluminum alloy, which is sturdy and durable.High hardness: hardness can reach HRC62, more durable. Silver-plated surface, good rust protection.Standard industrial grade block. Built-in high-precision linear bearings. It can move smoothly, with minimal wear and low noiseEasy to install: Aluminum alloy support rails are equipped with pre-drilled holes for easy assembly.Application: Standardized processing, very suitable for guide rail positioning. It is widely used in automatic machinery such as machine tools and bending machines.Specification:The length of the guide shaft: 300 mm.Rail diameter: 12 mm.Slider size: 39 x 40mm.Weight: 1380 gramsColour:silverMaterial:Carbon steelPackage Contents:2 * linear guide axis4 * bearing slidersOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.