1. There is a good tenacity and anticorrosion on the surface of the non-crystallized ring. Vickers diamomd hardness can be higher than HV1000, good stability and little friction factor when used in pairs with ordinary traveller.

2. Good antiwear property, stable in spinning, it's once-through operating life is longer one time than that of the ordinary PG rings.

3. Stable fricition factor is beneficial to control the tention of yarn and the shape of ballon. Long interval of traveller weighting, there is no need of weighting under general condition, or weighting only one number traveller after 6-9 months in running. Lower breakage and stable in spinning, so it is convenient to manage.

4. Easy to operate, short period to smooth running.

5. Obviously reduce fibrous yarn, raising yarn grade.

6. Superior property of yarn spinning, it can improve efficiency of spinning frame and quality of yarn, lower operator's labour intensity and raise economic benefits of cotton mills.