... convenient to use three pieces electric ball valve(3pcs ball valve),full bore1),Size:1/4"-------4"2),Material:stainless steel 304,316(CF8,CF3)3 ... API 6D7),Inspecion and test:API598,API6D8),Connection:threaded(NPT,BSPT,PT)9),Operation:hand,electric 3 pcs electric ball valve(electric ball valve,pieces ball valve,stainless steel ball valve)