The Brita Water Bottle Replacement Filters come in a set of 3, making a total of 9 filters. These filters are compatible with Aqua Optima and Brita Maxtra+ models. Made of white plastic, they are designed to remove chlorine taste and odor, making them suitable for household use. With 1-stage filtration, these water filters are an essential accessory for keeping your tap water clean and refreshing. The Brita brand ensures quality and reliability in providing safe and great-tasting water for you and your family.