this package is mostly for the 2ea rods to use as a bed stabilizer rails for  3D printer or CNC machines. The rods are straight and the right diameter for use with LM8UU bearings. 

OD 8mm x 200mm Cylinder Liner Rail Linear Shaft Optical Axis

- Material: bearing steal,GCr15
- Hardness: About  HRC58°
- Precision: g6
- Surface roughness: Below 1.5µM(Rmax)
- Surface hard-thickness: 0.8µ~3mm
- Outer diameter: 8mm
- Length: 500mm
- Staightness: Below 5µM/100mm
- Hard chrome thickness: 3.0µM(Rmax)


package included:
 1 X Linear Guides Light Rods Plated Shafts 8MM 20CM