... Mpa wellhead oil wellhead assembled of gauge bull plug, tree cap,threaded nipple,top connetctor,valves,cross and spoolNB:2-9 ... flanges,adapter spool,gate valve,choke valve and the tree cap. All wellhead tree manufctured by our fty are in accordance ... ! B.rgdsYancheng Qihang Petroleum Machinery Co.,Ltd oil wellhead assembled of threaded nippe,solid bull plug,tree cap,cap flange,top connector, valves ...