Guangzhou JST Seals Technology Co., Ltd was founded in 1995 and professional at designing, producing and selling ofﾠChristmas Tree /Wellhead Valves, Mud Pumps Valves, Hydraulic Systems seals, and seals on Offshore Well Equipment/Services ﾠ.We have passed ISO9001:2008,PR2 Test and got 17 Seal ProductﾠPatents and so on.