The Global Water 50GPD Reverse Osmosis Replacement Filter is a reverse osmosis replacement water filter with a large variety of valuable qualities. This replacement filter is compatible with all Global Water G3, G4, and G5 water coolers. This replacement water filter has a modest 50 gallon per day water filtration capacity, and a 12,000 gallon life time capacity. It is made of an extra tough polycarbonate resin that is also mold, mildew, and stain resistant. This replacement water filter will provide reliable and constant water filtration from all of your Global Water G3, G4, and G5 water coolers so you can sit back and enjoy cool and exceptionally clean drinking water every day. This filter's water purification system relies on gravity and reverse osmosis to remove harmful chemicals and malignant contaminants from your drinking water so you can serve and relish every single cup of water you drink. This filter also has a 3 year lifespan so you can simply install it, and never have to think about replacing it any time soon.