... Knurling Handle stainless steel mini ball valve connection: Female and welding Knurling Handle ,stainless steel mini ball valve Specifications 1. Productive technology ... 316L,321, ApplicationPetroleum, Chemical, Power, Metallurgy, Shipbuilding, Construction etcOthersSpecial design available according to your request3. Chemical composition ... 08 Knurling Handle ,stainless steel mini ball valve