Filmtec TW30-1812-50 50 GPD Membrane is an excellent performing Dow Filmtec RO 50 Gallons Per Day Membrane for most all standard drinking water systems. Very reliable, efficient, and a great value for your 50 GPD, standard reverse osmosis system. Filmtec membranes are one of the highest quality reverse osmosis membranes that you can get.
NSF listed. Manufactured in the USA. Usually replace every 3 years.
This is the TW30-1812-50 series.