Delemil company is a professional manufacturer of RO membranes for home drinking water system. We focus on membrane technology R&D for 10 years.We can offer you following sizes RO membranes for residential use:DE1809-50GDE1819-80GDE1809-100GDE1810-50GDE1810-70GDE1812-50GDE1812-75GDE2012-50GDE2012-100GDE2812-200GDE2813-400GDE3012-300GDE3012-500GAlso we can do customized design and offer OEM service!We are looking forward to cooperating with you!