The 4 Pack Great Value Replacement Water Pitcher Filters are designed for universal use, compatible with Brita filters. Made of durable plastic material, these white filters use coconut shell carbon filtration method to provide clean and fresh water for household use. Each filter can purify up to 40 gallons of water, making them a convenient and effective choice for maintaining a clean and healthy water supply in your home. With a total of 4 filters in the pack, you can ensure a steady supply of clean water for an extended period of time.