Many factors can affect the quality of products processed using CO2 laser tube, such as components, manufacturing processes and design parameters. The quality of a laser tube can be reflected in aspects of laser power, beam spot quality, stability and lifespan. When selecting a right CO2 laser tube, the power of laser tube needs to be considered according to the material of workpiece. The spot quality is determined by multiple steps of production process, laser spot size will directly influences the performance of laser equipment. The high stability of laser tube can help avoid problems such as gas leakage and burst. Because the laser tube is a kind of laser consumables, the service life must be a major consideration when selecting a laser tube.