SF Filter (ShuangFa Filter) is one of the earliest filter manufacturer in China, established in 1991, specialized in filter cartridges and filtering equipment for drinking water treatment and industrial liquid filtration. Our product includes String Wound Filter Cartridge, PP Melt Blown Filter Cartridge, Activated Carbon Filter Cartridge, Membrane Pleated Filter Cartridge, Filter System and Filter Housing, Filter Bag and Filter Media, High Flow Filter Cartridge, Bottle Filter, Fridge Filter, Gravity Filter etc. Suning Shuangfa Filter Appliance Co., Ltd. is a experts on string wound filter! We have the latest technology,20 years of experience and a complete raw material supplying chain for it. Since 2005, our wound filter has successfully maintained a large market share in Japan.Our head office is located in Guangzhou, China, and we have branch companies in Hong Kong, Hebei and Shanghai(Kunshan).