... AISI420 AISI440 Surface:Polish 1/2",3/4" 1,1/4' 1,1/2' Valves Stainless Steel 304Thread Ball Valves Stainless Steel 304Report Suspicious Activity Suspicious ... ,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 ... bearing 4. Ball valves for liquid and gas ect 1/2",3/4" 1,1/4' 1,1/2' Valves Stainless Steel Ball