2 DuPont Filmtec RO Membrane 100 GPD 100 Gallons Per Day Filters TW30-1812-100HR
With DuPont QR labels. Fits most reverse osmosis drinking water systems. FILMTEC TW30-1812-100HR. For best results the TW30-1812-100HR should be changed every 2 to 5 years based on water quality and usage.