Our company is a professional manufacturer of all kinds of membranes, such as RO/NF/UF/MF etc. All our RO & NF membranes are made of USA membrane sheet, so they have the best quality, but they are more cheaper. We have many standard sizes membranes, such as TW30-1812-50, TW30-1812-75, TW30-2012-100 for home drinking water system; TW30-4021, BW30-4021, TW30LE-4040, BW30LE-4040, XLE-4040, BW30XLE-4040 for commercial use; BW30-365, BW30-400 for industrial use etc. At the same time, we can do some customized membrane, such as TW30-2012-150, TW30-2812-200, TW30-3012-300 , TW30-3020-600, TW30-3020-1000 etc. By the way, we have UF membranes using in ED-Coat system, such as EDUF 4040, EDUF- 8040 etc; and UF-7940S for enzyme system etc. Because of our best product quality, best technical support, best delivery time, best after-service...we get the approbation from many many customers all over the world, they are all satisfied with us. For more products informations, please browse our website: http://www.amforinc.com. If you have any questions, please don&＃39;t be hesitated to inform me. we are looking forward to cooperating with you.