... 62 3.Grade:G100 4.1/2",3/4" 1,1/4' 1,1/2' 1/2",3/4" 1,1/4' 1,1/2' Thread Ball Valves ... :GB308-20026)Feature: wear-resisting, excellent surface quality and high hardness.7)Using:1. General industry for automobile, motorcycle, bicycle manufacturing ... , special bearings & micro – ball for the electronics industry. 2. High accuracy ...