... :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' Thread Ball Valves Stainless ... Steel 304 1.steel ball specification: 1)material:AISI ... , low noise special bearing 4. Ball valves for liquid and gas ect 1/2",3/4" 1,1/4' 1,1/2' Valves Stainless Steel Ball