Kelin Environmental Protection Equipment,Inc. is principally engaged in the research, development, design, manufacturing and distribution of bag filters, as well as the design of bag filter systems. The Company's bag filters include pulse bag filters, reverse air bag filters and mechanical hit bag filters, among others. Its bag filters are mainly applied in steel, non-ferrous metal smelting, power, construction material, cereal, waste incineration, iron alloy, coke, fire proofing material, lime, electrolytic aluminum, ceramics, chemical engineering, carbon black, medicine, house furnishing, tobacco, flour, wood processing, port transfer, heat supply and other industries. During the year ended December 31, 2009, the Company obtained approximately 55% and 37% of its total revenue from the sale of filters for metallurgy use and filters for electricity use, respectively.