Model Number:CNC Parts Set Type: Sliding Rail Glide : Linear Guide Accuracy Class: H Slide Fixed Way: Lock Type, Lock Type Non-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, XYZ module, slide, lifts, etc., widely used. colour:Silver Material:Aluminum alloy Package Contents: 2 * 8x200mm Steel Optical Axis 2 * KP08 55x13x29mm Zinc Alloy Pillow Bearing 4 * SK8 42x32x14mm Aluminum Rail Shaft Support 1 * 200x8mm Stainless Steel Lead Screw Rod with Nut 4 * SC8UU 8x34mm Slide Bushing 2 * 5x8mm D19L25 Flexible Shaft Coupling Only the above package content, other products are not included. Note: Light shooting 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.