... . Material: WCB.304,306,304L,306L Full Bore Ball Valve 2 pieces DescriptionMaterials WCB.304,306,304L,306LNominal Size1 ... spectrograph, Metallurgical Microscope, hardness tester, Universal testing machine, three-dimensional and other test instrument. And also have a ... field. Our products mainly include all kinds of ball valve, globe valve, gate valve, strainer, quick coupling, and a variety of ...