Green-Tak is the leading Stainless Steel Filter Housing Manufacturer in Taiwan. Green-Tak Water Filter Housing is 100% made in Taiwan and all materials are food grade and NSF requirements. The filter housing materials are polypropylene for white or blue filter housing; acrylonitrile styrene for clear filter housing, and both are available in various sizes: standard 10″, 20″, diameter 2.5″ to 4.5″, and special size are upon request. The single cartridge filter housings are widely apply to RO system, water filtration system and all related water treatment system for potable water