... 3)High quality. 1)About RO Membrane Housing:The Membrane Housing is made from FRP or stainless steel, Side opened and End ... manufacturer for all kinds of Water Filters and Elements such as filter housing, filter cartridge, connector, valve, faucet, UV light, FRP, ... and good service.3)Picture of RO Membrane Housing:FRP Membrane Housing: 301,304,316 stainless steel Membrane Housing: RO Membrane Housing