Guangxi Huihuang Langjie Environmental Protection Technology Co.,Ltd was founded in 2005 year. It focus on its development and production of Commercial vehicle engine post-processing exhaust emission control, which include generating set, vessel engine and Engineering machinery engine catalyst. We specialize in producing LNG catalytic muffler, SCR catalytic muffle,LNG catalyst , SCR catalyst, all kinds of catalyst, Diesel engine exhaust gas-purifying catalyst and rare earth nano-composite catalyst ,Honeycomb ceramic heat accumulation substrate,Honeycomb Ceramic Substrate,metal honeycomb carrier,ceramic ball,Metal packing,Plastic packing .