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This is for 4th stage Replacement RO membrane; replaced every 2 to 3 years, part no. 399 Model: WATERGENERAL RO6100+DI, RO6100DINT, RO6102DINT, RD-102, AND RD-106 TFC-100 High rejection TFC membrane we use genuine US MEMBRANE membrane filter, 100 gal/day, it removes 96% to 98% of all chemical, dissolved solids in tap water. (replace every 2 to 3 years). Our 100 GPD membrane fits all standard residential style membrane housings. Made in USA. |