Changzhou Song Ying Machinery Factory was established in 1996, which is specialized in producing sight glass and oil level indicator. Our products have spread to over 60 domestic large-medium enterprises in more than twenty provinces, municipality and autonomous regions, we also export to many foreign countries, such as US, England, Germany, Italy, Japan, India, etc. We have already passed ISO9001,CE,RoHs certifications , high quality and first-class service get much good reputation from the world.