The Osmio Clarity uses some of the best performing gravity water filter elements on the market, the Coldstream Sentry filters, which are made in the UK. The Housing is made using borosilicate glass and with mango wood stand and lid, making it a beautiful and functional shrine to your blessed water for your home. Recommend for households up to 4 people. Filters are recommended to change every 6 months, but it depends on water quality. Suitable for 1-4 users per system. High-performance filters - not designed for limescale reduction (up to 30% approximately is achieved) but has industry-leading performance for chemicals, heavy metals, plastic, hormones, fluoride and pharmaceuticals and a lot more. Please note, the Glass is fragile so the product must be handled with care. The holes cut for the glass are not perfect and may have very minor imperfections, but these are fully covered by the rubber gaskets (on both sides of the filters and for the tap). Do not overtighten the filters when installing as this may crack the glass. Use a jug to top the system up and be very careful handling it, especially with children around. The system comes with a set of filters, we recommend replacing filters every 6 months for the best performance.