Features: 1) All kinds of OEM butterfly valve discs available (normal type, high performance type, and stem discs) 2) Wholly machined or semi-finished according to the customers' drawings, from forgings or castings 3) Materials: all kinds of stainless steel (AISI316, AISI316L, AISI304, AISI304L, 17-4PH, DIN1.4469, DIN1.4529, CD4MCu), carbon steel (WCB, WCC, LCC), cast iron, aluminum bronze