Hunan Loongrise magnetic & Electronic Technology Co., LTD. is a professional manufacture of various kinds of ferrofluids and vacuum feedthrough for industrial use for more than 5 years,our products are mainly used in vacuum coating SF6 switch. semiconductor industries .we can offer both standard and custom designed feedthrough according to your request .All of our product are with good quality and competitive price. we are also professional and strong at the repairing of various ferrofluid feedthroughs.  we adopting MAZAK (Japan)multi series CNC precision lathes and helium mass spectrographic machine which ensures the manufacturing stability and inspection reliability of our products.