FX12M Features: -Membrane.-The GE FX12M RO Membrane produces healthier, better-tasting drinking water and cooking water.-The GE FX12M reverse osmosis membrane improves flavor of hot and cold beverages including coffee, tea, and juices.-The GE SmartWater FX12M Membrane is a thin film polyamid reverse osmosis membrane.-The GE SmartWater FX12M Membrane should be replaced approximately every 2 years.-The GE SmartWater FX12M Membrane should be replaced approximately every 2 years.-98.00pct of Arsenic 99.00pct of Chemicals/VOC"s 99.00pct of Copper 99.95pct of Cysts 99.00pct of Lead 97.00pct of Mercury 97.00pct of Tannins Chlorine Taste and Odor Magnesium Nitrate/Nitrite Rust Sediment Sodium. Dimensions: -Overall dimensions: 1" H x 11" W x 1" D.