... HRC58-62 3.Grade:G100 4.1/2",3/4" 1,1/4' 1,1/2' 1/2",3/4" 1,1/4' 1,1/2 ... , AISI 1010, AISI 10152)Size:0.5mm-50.8mm3)Grade:G100-G20004)Hardness: Hrc58--625)Producing standard:GB308-20026)Feature ... High - speed, low noise special bearing 4. Ball valves for liquid and gas ect 4.Enjoy more of the steel ball product ... images: 1/2",3/4" 1,1/4' 1,1/2' Thread Ball Valves Stainless Steel ...