2 New DuPont Filmtec RO Membrane Filters 50 Gallons Per Day TW30-1812-50HR RO
With DuPont QR code labels. Fit most reverse osmosis drinking water systems. FILMTEC TW30-1812-50HR. For best results the TW30-1812-50HR should be changed every 2 to 5 years based on water quality and usage.