DERVOS ball valves materials include Carbon Steel, Alloy Steel, Low-temperature Carbon Steel, Stainless Steel, 20 Alloy, Duplex Stainless Steel, Aluminum Bronze, etc. Cast steel materials include: WCB, CF8, CF8M, CF3, CF3M, C5, WC6, WC9, LCB. Forged steel materials include: A105, F304, F316, F304L, F316L, F5, F11, F22, LF2. DERVOS ball valves can be customized according to your needs.