"Specifications 1. CF45/GCR15; 2. Precision grade: g6; 3. Chrome plating; 4. TBI brand qualtiy guantee. Application: Optical axis is widely used in Industrial automatic machine,such as Industrial Robot,Automatic Recording instrument,Computer,Precision Printers and so on.Optical axis can also extend the uselife of industrial automatic machine. http://www.sinier.cc/"