Type: Sliding RailGlide Path: Linear GuideAccuracy Class: HSlide Fixed Way: Lock Type, Lock TypeNon-toxic and tasteless, environmental protection, small size, transmission power of large, stable performance.Mainly used for industrial automation equipment, stepper motor rails. Such as 3D printers, engraving machine, module, slide, lifts, etc., widely used.color: WhiteMaterial: aluminum alloyPackage included:4 pcs x 8x400mm Steel Optical Axis4 pcs x KP08 55x13x29mm Zinc Alloy Pillow Block Bearing8 pcs x SK8 42x32x14mm Aluminum Rail Shaft Support2 pcs x 400x8mm Stainless Steel Lead Screw Rod with Nut8 pcs x SC8UU 8x34mm Slide Bushing4 pcs x 5x8mm D19L25 Flexible Shaft CouplingOnly 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.