After make special treatment on ring surface, its hardness can reach over HV2000, so can Prolong the usage period of more than 2 times.

It can run more stability after install on the ring frame, its recession is later than that of others.

It can heighten the yarn quality, save the labor to lower the labor cost relatively.

It adapts for high spindle spinning, also can help to decrease yarn breakage and yarn feather.