Product Description Size: NPS 1/2 ~ 16 Class 150~900Basic Design: API 599,API 6D Face to face standard: ANSI B16.10, API 609 Ends Connection: ANSI B16.5(RF), ANSI B16.25 (BW) Material: WCB, LCB, WC6, WC9, C12, C5, CF8, CF3, CF3M, and CF8M