Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Type: Sliding Rail Glide Path: Linear Accuracy Class: H Fixed Way: Lock Type, Lock Type Non-toxic and tasteless, environmental protection, small size, transmission of , stable performance. Mainly used for industrial automation equipment, rails. Such as 3D printers, engraving machine, module, , lifts, etc., widely used. color: White Material: aluminum alloy Package Included: 2 pcs x 8x400mm Steel Optical Axis 2 pcs x KP08 55x13x29mm Alloy Pillow Block Bearing 4 pcs x SK8 42x32x14mm Aluminum Rail Shaft Support 1 pcs x 400x8mm Stainless Steel Lead Screw Rod with Nut 4 pcs x SC8UU 8x34mm Bushing 2 pcs x 5x8mm D19L25 Flexible Shaft Coupling Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.