As a professional adhesive tape manufacturer, we have a cooperative system with local university and meister high school.We have developed and tested environmentally friendly products to remove fine dust and are trying to contribute to export and employment expansion in the future.It also applied for a patent and reflects the needs of various customers with delicate products.Fine dust screen filter product is necessity for daily life.It has an effectve role as an air purifying function.23 years Know How is pride of our company.We has been supplies interior products to large companies.Please refer our website abourt the other things.www.song-cheon.com.www.ec21.comwww.buykorea.or.krwww.blog.daum.net/csch6812Thank you.