2 New DuPont Filmtec RO Membrane 75 Gallon Per Day BW60-1812-75 TW30-1812-75
With Dupont QR code labels. Fits most reverse osmosis drinking water systems. FILMTEC BW60-1812-75. For best results the BW60-1812-75 should be changed every 2 to 5 years based on water quality and usage.