Shenzhen hengji mechanical & electrical equipment co., ltd.,which is a subsidiary of the tuobang filter co., ltd..it is a global provider of filtration products and services with a worldwide customer base, superb product quality, an extensive distribution network and the industry's broadest product line.specialized in filter series field:oil filters, fuel filters, air filters and fuel-water seprator filters,for instance. shenzhen hengji mechanical & electrical equipment co., ltd. is continuing to focus on providing superior filtration products, covering fuel filter/water separator, oil water separator, oil filter, air filter, fuel pump to the engine, industrial and environmental filtration market. the products are widely applied to automobile, engineer machine, heavy-duty vehicle, power generator unit, air compressor and oilfield equipment.