Type: Sliding Rail Glide Path: Linear Guide Accuracy Class: H Slide Fixed Way: Lock Type Non-toxic, odorless, environmentally friendly, compact size, high performance, stable operation Mainly used for industrial automation equipment, stepper motor rails, 3D printers, engraving machines, XYZ modules, slides, lifts, and other applications Color: White Material: Aluminum Alloy Package Included: 2 pcs x 8x400mm Steel Optical Axis 2 pcs x KP08 55x13x29mm Zinc Alloy Pillow Block Bearing 4 pcs x SK8 42x32x14mm Aluminum Rail Shaft Support 1 pc x 400x8mm Stainless Steel Lead Screw Rod with Nut 4 pcs x SC8UU 8x34mm Slide Bushing 2 pcs x 5x8mm D19L25 Flexible Shaft Coupling Note: Light shooting and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowed error is +/- 1-3 cm. Only the above package content is included; other products are not included.