Dalian Frontier Import Export is a high quality supplier of trunnion ball valve and gate globe check valve for oil and gas industry. Our “frontier” brand name valve is on the approved vendor list of PETRONAS. Products are made in our manufacturing factory in china or Canada depending on the size and rating. We also supply PEEK or DELVON seats and gaskets carbon steel casting parts with competitive price. Material: WCB/A105N/LF2/DUPLEX F51 ETC If you have any enquiry please feel free to contact me, I would be pleased to work with you. Sunny ***** dalian frontier import & export co., ltd 1405 classic century, dalian, china